U.S ° Army Ceast.&ng.Res .Ctv MR 82-10 Sand Resources on the Inner Continental Shelf off the Central New Jersey Coast by WHO DOCUMENT © COLLECTION Edward P. Meisburger and S. Jeffress William MISCELLANEOUS REPORT NO. 82-10 OCTOBER 1982 Approved for public release; distribution unlimited. U.S. ARMY, CORPS OF ENGINEERS COASTAL ENGINEERING te RESEARCH CENTER BIG | Kingman Building 203 Fort Belvoir, Va. 22060 1053 \ | MR &2-\0 Reprint or republication of any of this material shall give appropriate credit to the U.S. Army Coastal Engineering Research Center. Limited free distribution within the United States of single copies of this publication has been made by this Center. Additional copies are available from: Natconal pee ee ee Service d e Ope ations | UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) REPORT DOCUMENTATION PAGE BE SS CORE ONS 1. REPORT NUMBER 2. GOVT ACCESSION NO 3. RECIPIENT'S CATALOG NUMBER MR &2-10 4. TITLE (and Subtitle) 5. TYPE OF REPORT & PERIOD COVERED SAND RESOURCES ON THE INNER CONTINENTAL Miscellaneous Report SHELF OFF THE CENTRAL NEW JERSEY COAST 6. PERFORMING ORG. REPORT NUMBER 7. AUTHOR(a) 8. CONTRACT OR GRANT NUMBER(a) Edward P. Meisburger S. Jeffress Williams 9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT, PROJECT, TASK y AREA & WORK UNIT NUMBERS Department of the Army Coastal Engineering Research Center (CEREN-GE) Fort Belvoir, Virginia 22060 11. CONTROLLING OFFICE NAME AND ADDRESS 12. REPORT DATE Department of the Army Cctober 1982 Coastal Engineering Research Center 13. NUMBER OF PAGES Kingman Building, Fort Belvoir, Virginia 22060 48 14, MONITORING AGENCY NAME @ ADDRESS(If different from Controlling Office) | 15. SECURITY CLASS. (of thie report) C31665 UNCLASSIFIED 1Sa. DECLASSIFICATION/ DOWNGRADING SCHEDULE 16. DISTRIBUTION STATEMENT (of this Report) Approved for public release; distribution unlimited. - DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report) » SUPPLEMENTARY NOTES - KEY WORDS (Continue on reverse side if necessary and identify by block number) Geomorphology Sediments New Jersey coast Seismic reflection Sand resources 20. ABSTRACT (Continue em reverse side if neceasary and identify by block number) About 1800 square kilometers of the central Mew Jersey inner shelf between Avalon and 7.5 kilometers north of Barnegat Inlet was surveyed to assess and quantify marine sand and gravel resources 6 meters below the sea floor. The primary data consist of 1133 kilometers of high-resolution seismic reflec- tion profiles, limited side-scan sonar coverage, and 97 vibracores, a maximum of 6 meters long. Limits of the surveys were generally from about the -/7-meter depth contour seaward to about the -21l-meter depth contour, a maximum of some 22 kilometers offshore. (continued) FORM ’ 5 BSO DD .5an 73 1473 = EDITION oF # Nov és iso LETE UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (tren Data Entered) UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE(When Data Entered) Analyses of the survey data reveal that an estimated 172 million cubic meters of suitable sand is present in 15 different locales. Most of the sand is contained in linear and arcuate shoals that appear to be Holocene to modern in age. The shoals are resting on a pre-Holocene age substrate composed of sedimentary deposits of fluvial origin. These deposits show evidence of past subaerial erosion. UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE(When Data Entered) PREFACE This report is one of a series which describes results of the Inner Conti- nental Shelf Sediment and Structure (ICONS) study. The preliminary objective of the ICONS study is locating and delineating offshore sand and gravel deposits suitable for beach restoration and maintenance. The subject of this report is three survey areas off the central New Jersey coast. The work was carried out under the U.S. Army Coastal Engineering Research Center's (CERC) Barrier Island Sedimentation Studies work unit, Shore Protection and Restoration Program, Coastal Engineering Area of Civil Works Research and Development. This report was prepared by Edward P. Meisburger and S. Jeffress Williams, CERC geologists, under the general supervision of Dr. C.H. Everts, Chief, Engineering Geology Branch, and Mr. N. Parker, Chief, Engineering Development Division. Original copies of all the seismic records from the Barnegat and Little Egg surveys are stored at CERC. The cores from these surveys are in a repository at the U.S. Geological Survey in Reston, Virginia. The records and cores from the Ocean City to Avalon survey are at the U.S. Army Engineer District, Philadelphia. Technical Director of CERC was Dr. Robert W. Whalin, P.E., upon publica- tion of this report. Comments on this publication are invited. Approved for publication in accordance with Public Law 166, 79th Congress, approved 31 July 1945, as supplemented by Public Law 172, 88th Congress, approved 7 November 1963. A a ED E. BISHOP Colonel, Corps of Engineers Commander and Director CONTENTS = CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (SI) ..... I NBEO DOSING 6 6 6 G6 6 O06 6 6 66660 O66 Oo Il SURMEONG 56 6 6 66 oO G6 6) 6M6 6 o SB G676 6° 4 695 0 66 6 IIl POTENTIAL BORROW AREAS . . .. 2. « © © © © © © «© © © © © IV SUMMARY AND RECOMMENDATIONS . ... - «© © « © «© « «© © © @ «© APPENDIX A CORE SEDIMENT DESCRIPTIONS .§.. .. «+... +++ «+ «© « B GRANULOMETRIC DATA AND CUMULATIVE CURVE PLOTS ....... C SEISMIC REFLECTION PROFILES . . 2. 2. «1 «© 6 «= «© «© «© «© 6 ow TABLES Grain-size scales--soil classification ........-+e+-+-es-e. Primary sediment classes from the central New Jersey shelf ... Potential borroweateas cura ciieuleMcilcil cul cme ciiiel i rciitey itil mtounet-nOmS Cores from the Ocean City to Avalon survey .......-+-e.-e. rRoplaahayy, Cong Gales 616 G6 6 6 6966 0 6 6 66 06 O65 0 5 0 6 FIGURES (Cainer WT VEN STENChY EEREEY Go 6560 6000000000000 Location of seismic reflection profiles and vibratory cores in the Barnegat Inlet, New Jersey, area . .... 2 «© « © » «© © «@ « Location of seismic reflection profiles and vibratory cores in the study area from Ship Bottom to Atlantic City ........ Location of seismic reflection profiles, side-scan sonar records, and vibracores off Ocean City to Avalon segment. ........ Bathymetric map of the inner shelf off Barnegat Inlet, New Jersey Bathymetric map of the shelf from Harvey Cedars to Atlantic CEhiy, MEY dERECSZ o 5 5 0605600005000 50000 00000 Bathymetric map of the study area south of Ocean City to ELIOM, WEY JERE 5 0 0 0 6056006000 000060000 Page 17 22 23 10 11 12 13 14 CONTENTS FIGURES-—Cont inued Page 8 Map of the Barnegat Inlet shelf area showing shoal areas having the highest potential for sand suitable for beach myopincasMENS 6 6 6 660606000 O OOOO OOO OG 6 OG Go (CY) 9 Map of the Little Egg Inlet shelf area showing shoal areas having the highest potential for sand suitable for beach MOSSE 6 Goo 900056000 Go FO OO OD OD OO oo 4 og QW 10 Map of the Ocean City to Avalon shelf area showing shoal areas having the highest potential for sand suitable for DAAC) MouTIHIMENS Gio Goo Oooo oO Oooo oC ooo oD og All CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (SI) UNITS OF MEASUREMENT U.S. customary units of measurement used in this report can be converted to metric (SI) units as follows: LE ELE Multiply by To obtain inches 25.4 millimeters 2.54 centimeters square inches 6.452 square centimeters cubic inches 16.39 cubic centimeters feet 30.48 centimeters 0.3048 meters square feet 0.0929 square meters cubic feet 0.0283 cubic meters yards 0.9144 meters square yards 0.836 Square meters cubic yards 0.7646 cubic meters miles 1.6093 kilometers square miles 259.0 hectares knots 1.852 kilometers per hour acres 0.4047 hectares foot-pounds 1.3558 newton meters mb eihacs WOOT = Om? kilograms per square centimeter ounces 28.35 grams pounds 453.6 grams 0.4536 kilograms ton, long 1.0160 metric tons ton, short 0.9072 metric tons degrees (angle) 0.01745 radians Fahrenheit degrees 5/9 Celsius degrees or Kelvins! 1To9 obtain Celsius (C) temperature readings from Fahrenheit (F) readings, use formula: C = (5/9) (F -32). To obtain Kelvin (K) readings, use formula: K = (5/9) (F -32) + 273.15. SAND RESOURCES ON THE INNER CONTINENTAL SHELF OFF THE CENTRAL NEW JERSEY COAST by Edward P. Meisburger and S. Jeffress Williams I. INTRODUCTION The construction, improvement, and periodic maintenance of beaches and dunes by the placement of suitable sand along the shoreline is an important means of counteracting coastal erosion and of enhancing recreational facil- ities (U.S. Army, Corps of Engineers, Coastal Engineering Research Center, 19771). In recent years, it has become increasingly difficult to obtain large volumes of suitable sand from lagoons and land-based sources for this purpose because of economic and ecological factors. Accordingly, the Coastal Engineering Research Center (CERC) initiated an Inner Continental Shelf Sedi- ment and Structure (ICONS) study to locate offshore sand resources suitable for beach nourishment. This report, part of that effort, deals with the location and physical characteristics of offshore sand deposits on the inner shelf adjacent to the central New Jersey coast. It is the third report in the CERC series on sand resources off the New Jersey coast. The study area is a 1800-square kilometer zone, 13 to 22 kilometers wide, adjacent to the shore which extends from Avalon north to 7.5 kilometers north of Barnegat Inlet (39°00' N. to 39°50.0' N.) (Fig. 1). Survey data collected by CERC from the Barnegat Inlet and Little Fgg Inlet regions consist of 953 trackline kilometers of seismic reflection profile and 67 sediment vibracores ranging from 0.34 to 3.75 meters long (Figs. 2 and 3). The data from the Ocean City region (Fig. 4) were collected by a private contractor with the U.S. Army Engineer District, Philadelphia. CERC collected and analyzed 180 kilometers of seismic and side-scan sonar data and 30 cores from 2 to 6 meters long and averaging 4.2 meters. These data were supplemented by National Ocean Survey (NOS) hydrographic data and pertinent scientific and technical literature. Parts of this report dealing with the Barnegat and Little Egg Harbor survey areas are primarily the result of a reconnaissance effort; seismic line spacing and core density are not suitably detailed for reliable delinea- tion of borrow sites. Consequently, further study of promising locales in these areas is needed before selection or use in project design and construc- tion. The Ocean City survey was designed to evaluate sand availability for ‘a specific beach-fill project and therefore may be considered final. II. SETTING The inner shelf off central New Jersey is a topographically and geologi- cally complex region (Figs. 5, 6, and 7). The principal topographic elements ly.s. ARMY, CORPS OF ENGINEERS, COASTAL ENGINEERING RESEARCH CENTER, Shore Protection Manual, 3d ed., Vols. I, II, and III, Stock No. 008-022-00113-1, U.S. Government Printing Office, Washington, N.C., 1977, 1,262 pp. NEW JERSEY New York Bay Sandy Hook “Co, Long Branch Point Pleasant + 4 Barnegat Inlet STUDY AREA Little a gg Inlet Brigantine Atlantic City orcanicis ATLANTIC OCEAN Avalon 39°+ Cape May Cope Henlopen 75° i Figure 1. Central New Jersey study area. *eaire ‘Aasiter MON SJeTUL Yesoureg ey} UT Set0d kz0je1qTA pue seTtjoad uofzAdeT Jor OTustTes Jo uoTzeIOT *7 eAinsTy Kyig yang vo U0!}D907 dJOIDIGIA ee Qul|y¥OO4) d1wWsiag —— AI + ¢r06¢ 49/U/ {obausog 74°25' 74°20' 74°15) 74°10 74°05' 74°00 Harvey 39°40' KEY + Seismic Trackline @ Vibracore Location Ship SCALE Bottom 0 5 10 nmi Peas ae aeegenua: ih saean ein 39°30° We ie g Peete \ Beigenun ey , cs wf pe PT hl j nleé M 15 1 , N Ean Sracigenseecse mee Beach ; mn i aes “7 Sameeh pe ATLANTIC OCEAN Atlantic. Geen : 5 39°20! City + | ={C Figure 3. Location of seismic reflection profiles and vibratory cores in the study area from Ship Bottom to Atlantic City, New Jersey. °4seoo Avsior MON 242 FO Juowses uoTeAY 03 ARTO ue|e20 JJO FTeys ayq uO Sa0Inosel pues ssasse 02 peSN saiodeiqyA se [Tem se spr0dea Teuos Ub DS-epTs pue seTTjoid uorqAeTjel opPuUstes Jo uoTWeD07 °y oin3Ty \ cog * 2lGdl el Gel bl Sb SI 9I "1 9, Guljy2OJ] JOUOS UDIS-aPIS PUD Jiwsias u01j0907 3309 e AASYsr MIN pas: ° % *Aasior may ‘Je TU] Jeseuzeg Jjo JTeys az9UUT yu} jo dew otajqowhyjeg ‘*c aan8Tq NV. JILNV TLV 20/, Ei 4 a €| SG ye/u/ {oObausog SWOYJOY Ul SINOJU0D l2 Contours in Fathoms SCALE 5 10 Ami 5 10 iS km [—— ox ——¢ :—— = —— _—— SSE S= Brigantine : beacy’ Absecon~ Figure 6. Bathymetric map of the shelf from Harvey Cedars to Atlantic City, New Jersey. ‘asia MeN SuoTeAy 03 AQT) ueesQ Jo yAnos eerie Apnqs syuq jo dew otaqowAyqeg °y oan3Ty yt a B o° oA, oe? S % ; “Gp PEF 2 “Gp wid € 2 i) ° os o 2 a Q, re) fs) cs, ere wt ast NVIIO DILNVILY OS VAS (az A3aSY3r MIN ee x ; ‘s °. 02° sb = o, o° O , cee 14 are the shoreface and the adjacent inner shelf sea floor. Secondary elements, which consist mostly of inlet-associated shoals and linear-type sand shoals, create the irregular bottom topography characteristic of this region. The linear shoals occur both as projections from the shoreface and as isolated shoals on the inner shelf floor (Duane, et al., 19727). Their relief of several meters and lengths to several thousand meters offer the highest potential for sand resources. The coast adjacent to the study area is composed of sandy, low-lying barrier islands which are backed by narrow and shallow lagoons; the islands are divided in several places by tidal inlets. Sediments recovered in CERC cores from the study area are described in the visual logs in Appendix A. In the logs and elsewhere in this report particle-size descriptions follow the Wentworth scale (Table 1). Grain-size data for selected sand-size samples from the cores are contained in Appendix B. Reduced line profiles of selected seismic reflection are in Appendix C. Most of the sediments from the study area can be grouped into a number of characteristic types on the primary bases of grain size and mineral compo- sition. These categories are summarized in Table 2. Letters designating the sediment classes are used in the core log descriptions to identify the core intervals occupied by sediment conforming in general to the type description. Sediments which do not conform to any of the types are identified by the letter U. Similarities between sediments in a particular category do not necessarily indicate a stratigraphic relationship; in many cases they may be due to similarity in source and environment of deposition. The various sediment types found in the study area are largely consistent with the class categories described by Meisburger and Williams (1980)? for the Cape May area. Consequently, the letter designators and category descrip- tions in Table 2 of this report are about the same, with only minor changes, as those of the Cape May report. The typical surficial sediment in most of the study area is light brown quartz sand containing relatively small amounts of mollusk shell fragments. Locally, there are admixtures of granules and rounded pebbles which, for the most part, consist of rock fragments. Most of the surficial sediment appears to be of modern to Holocene age and was deposited and reworked by nearshore processes from the last transgression of the sea to the present. The sur- ficial sediments are thickest in shoal areas and become relatively thin and locally discontinuous between shoals where older pre-Holocene sediments 2DUANE, D.B., et al., "Linear Shoals on the Atlantic Inner Continental Shelf, Florida to Long Island," Shelf Sediment Transport, Dowden, Hutchinson, and Ross, Inc., Stroudsburg, Pa., 1972, pp. 447-498 (also Reprint 22-73, U.S. Army, Corps of Engineers, Coastal Engineering Research Center, Fort Belvoir, VaeeUNTISS770n172)e 3MEISBURGER, E.P., and WILLIAMS, S.J., "Sand Resources on the Inner Conti- nental Shelf of the Cape May Region, New Jersey," MR 80-4, U.S. Army, Corps of Engineers, Coastal Engineering Research Center, Fort Belvoir, Va., July 1980. Table 1. Grain-size scales--soil classification (modified from U.S. Army, Corps of Engineers, Coastal Engineering Research Center, 1977"), Unified Soils |astm Phi Wentworth Classification | Mesh Value} Classification Pee ee | BOULDER — COBBLE SEO Te ; COIL ZIT COBBLE | COARSE tas Sl eee ‘ibaa = ASSYLEE; FINE GRAVEL| ne WE ean PEBBLE coarse Beer 5 ep ete i ee ‘| GRAVEL iid sie | SES MLS ‘) coLvoip “ise ARMY, CORPS OF ENGINEERS, COASTAL ENGINEERING RESEARCH CENTER, Cg Calon Mo Wo Table 2. Primary sediment classes from the central New Jersey shelf. Quartz sand Typically very pale brown (10 yr 7/3)!, fine to coarse grain size; 1 to 5 percent shell (predomi- nantly Sptsula), well to poorly sorted; silty in places but predominantly clean; granules present locally. Typically variable grayish-brown color; sand, granules, and pebbles; shells comprise 1 to 10 percent; generally very poorly sorted; often silty, which occurs in thin layers in most places; frequently consists of reworked substrate. Sand and gravel Typically gray (5 yr 6/1) but occasionally brownish gray; mostly barren but contains shells in places; washed residue may contain sand, mica, and pieces of vegetation. Silt and silty clay Clean to silty sand Typically grayish brown (10 yr 6/1 to 10 yr 7/2); occasionally yellowish or reddish-yellow, very fine to fine sand; generally well sorted; mica- ceous locally. Typically very light gray (5 yr 7/1) but often grayish to reddish brown; very poorly sorted sand, predominantly quartz; granules and pebbles con- sist mostly of quartz and rock fragments. Sand and gravel uartz sand Typically very light gray (5 yr 7/1) but often y grayish to reddish brown; very similar to type E but with little or no gravel; poorly sorted, quartz predominant mineral. IMunsell Soil Color Code (Munsell Soil Color Charts, 1944 ed., Munsell Color Co., Inc., Baltimore Md.). often crop out. The composition and textural properties of the surficial layer suggest that it is derived from erosion and reworking of the pre- Holocene substrate. Below the surficial sediments are diverse sediment deposits ranging from organic-rich mud to gravel. Many are thin bedded and appear to have little lateral extent. Few of these deposits contain mollusk shells and shell fragments or other calcareous organic particles. Some are yellowish brown, which suggests that they may have been deposited in a subaerial setting or have been exposed to leaching subsequent to their deposition. The hetero- geneous character, extremely poor sorting, and oxidation type color of the coarser subsurface deposits, as well as the presence of channellike sub- bottom reflectors on the seismic records, suggest a fluvial origin. III. POTENTIAL BORROW AREAS Analyses of the geophysical records and vibracores identified 15 poten- tial borrow areas where sand judged suitable for beach nourishment may be recovered. The areas are identified by letters A to O in Figures 8, 9, and 10. Tables 3 and 4 provide a summary of the pertinent information for the 15 borrow areas. Volume calculations were made for the Holocene marine sand deposits where seismic reflection and topographic control were suffi- cient for a reasonably reliable estimate. In addition, 10 cores at isolated sites contained suitable sand but additional data are needed to fully evalu- ate them. Table 5 contains data on these sites, identified by core number, where the specified core recovered potentially usable sand from deposits which were not associated with any discernible topographic or seismic reflec- tion features. For this reason the core data could not be projected beyond the immediate area of the core site and no area or volume calculations could be made. Some of these sites contain Holocene marine sand (type A) which does not seem to be associated with a prominent shoal. The remaining sites contain type E or F material which is thought to be pre-Holocene fluvial sediment. IV. SUMMARY AND RECOMMENDATIONS Approximately 1800 square kilometers of the central New Jersey shoreface and Inner Continental Shelf was surveyed, using several seismic reflection devices and a total of 97 vibratory cores to locate and quantify sand resources suitable for use as fill in nourishing recreation beaches on the adjacent barrier islands. Study results show that a large number of linear and arcuate shoals are present which contain large volumes of clean quartz sand. Most of the shoals appear to be Holocene to modern in age and to over- lie a substrate of pre-Holocene sedimentary deposits which are fluvial in origin and exhibit characteristics of past subaerial erosion. It is esti- mated that about 172 million cubic meters of suitable sand from 15 potential borrow sites is present. In addition, 10 other sites were found to contain suitable material, but there are insufficient data on these sites to project the deposit beyond the core site or to estimate volumes available. Addi-' tional data are required to evaluate these sites. A very important consideration that was not addressed in this report is the possible adverse effects of removing sand by dredging from shoreface 18 ATLANTIC OCEAN KEY @ Vibracore Site Figure 8. Map of the Barnegat Inlet shelf area showing shoal areas having the highest potential for sand suitable for beach nourishment. Sites A to D are described in Table 3. 74°10' Horvey Cedars _ Borneqat Survey Area _ ATLANTIC OCEAN Figure 9. Map of the Little Egg Inlet shelf area showing shoal areas having the highest potential for sand suitable for beach nourishment. Sites E to K are described in Table 3. 20 °€ OTGBL UL peqrazdsep 21k Q 0] JT SoqTS *juem -ySTinou yoraq 1OJ eTqejtns pues AOF TeTJuejod yYsoaysty aeyq BSuraey seoie [eoys BuTMOYS Bere JTeys uoTeAYy 07 AQT) ue|aDQ ay jo dey NVIIO JILNVILY_--— a= yw c apnys 3° Be =~ i) 02e7v =—- et "OT eansty 2 | yeoys 1e8UzyT : 0€ ‘92 =a ie | MM TT 93 6 yBoys 1e8UutT ‘pues uyeid-asie0. 0} €72 ‘07 ‘8T TT 93 6 ‘ 6 6 Teoys 1B8UuTT -un} peu ‘ueaTo ufequod ¢Q 0} J seeie Be Bl NEAL LT‘9T [Boys 1eaUT anq eTqeTFeae jou sysjeue ozys-uredig | “CT ‘ZT“TT ‘OT GT 93 6 yeoys 1vaUTT 98 9T 92 ST yeoys 1ze8ury] €8‘18 GT 97 6 yeoys 1eaUuTT GB‘eL €T 03 6 qTeoys 1BeUTT ; c8 TT 93 6 €L°ZL‘°0L°69 yeous 1eauty °g9€9° Ly 94 TT 99 £ yeoys 1eeuty] LL°9OL‘4Y TT 03 £ yeoys iesuyz’] SL @- ©) ©) [Boys 1ev8UT] 1 99‘9¢°7S ‘TS €T 93 6 yeoys 1eauTy] GS ‘TY €T 93 6 Teoys 1e8uTy] ze ET 03 6 [Boys Jotul 97 6 91 2 oo | cay _| (w) | (24 OT (Fd) (w) anon SRCTED UES (EE 3ysodap addy pe euy3sq ssouyoTuL : azy~s upeiy ‘ON 9109 yadep 13aqey uofzeustsag *seeae MOII0g [eT}UeI0g “€ STqeL 22 Table 4. 3.4 S19) 4.5 6.1 3.0 4.2 2.4 4.8 4.3 3.4 4.2 3.6 4.5 13.7 5.0 10.4 2.2 8.5 2.9 9.1 2.4 8.5 5.0 7.3 4.8 9.1 6.0 6.7 5.2 9.8 4.6 10.7 3.0 9.5 3.5 7.3 5.0 10.7 5.9 10.1 5.7 8.5 2.0 10.4 4.4 9.1 4.4 Table 5. | Water depth (m) oo ° = Water Core Overburden | Medium-coarse |' Core depth | length | thickness sand thickness location (m) @) @) ‘@) Pr e = Linear shoal Shoreface Shoreface Shoreface Shoreface Shoreface a ° N ° 0 o 8 « oOowsp Linear shoal ARUN OWWFROFNWARDSD Linear shoal Linear Linear Linear Linear Linear Linear Linear Linear Linear shoal Linear shoal Shoreface Shoreface Shoreface Linear shoal Linear shoal Linear shoal shoal shoal shoal shoal shoal shoal shoal shoal rPrFworFw ee @ ° Lvs) e eo FPONOWOOWODOONOANNNEDND Promising core sites. Mean diameter Grain size 23 Cores from the Oaean City to Avalon survey. Intershoal swale Intershoal swale Intershoal swale Intershoal swale Intershoal swale Intershoal swale swale swale swale swale swale swale- swale swale swale swale Ea eee ue areas or from the nearshore shoals. Various studies have shown that the shoreface to some seaward "close-out" depth is in dynamic equilibrium with the shore (e.g., Hallermeier, 19819). If sand were dredged from within this zone it may cause sand to move seaward from the beach and aggravate coastal erosion. The shoals present within the study area, even out to depths of -20 meters, appear to be acted upon by modern coastal processes, and modi- fication or removal of the shoals by dredging could affect wave energy levels on the adjacent coast as well as the coastal sediment budget. These subjects should be studied in detail before initiation of any sand removal by dredging. SHALLERMEIER, R.J., "“Seaward Limit of Significant Sand Transport by Waves: An Annual Zonation for Seasonal Profiles," CETA 81-2, U.S. Army, Corps of Engineers, Coastal Engineering Research Center, Fort Belvoir, Va., Jan. 1981. 24 APPENDIX A CORE SEDIMENT DESCRIPTIONS This appendix contains sediment descriptions from cores in the Barnegat and Little Egg Inlets region. They are based on both megascopic and micro- scopic examination from sampling locations shown in Figures 2, 3, and 4. Sediment color is based on dry samples. The letter "b' denotes the bottom of the core. Sediment names are based on the following Wentworth classifications (see Table 1). Sediment Gravel Very coarse sand 1.0 to 2.0 Coarse sand 0.5 to 1.0 Medium sand 0.25 to 0.5 Fine sand 0.125 to 0.25 Very fine sand 0.0625 to 0.125 Silt and mud <0.0625 Very well sorted Well sorted Moderately well sorted Moderately sorted Poorly sorted Very poorly sorted Extremely poorly sorted ZS) SY¥3L3W a) is) (a) puss snosseotu ouzZ 02 UFZ Aran *(T// ah ¢) 4vrB 34877 (qd) 82TQGed pue ‘satnuei3 ‘puss esiv0> 02 eUTZ *(€/Z 34 OT) Unorq oTed Aaa, (V¥) pues wnzpew ‘(7/9 a4 OT) 418 34877 pea 62 3409 (9) 3TFS *(Z/9 24 OT) 4e18-ystunoaq 34877 (v) pues ourz ‘(z/, 24 ¢*z) Sea8 ay8ta] | (V) SeTqqed pue ‘satnues3 ‘puss esis02 03 2UFZ *(Z/9 34 ¢°Zz) hvs8-ystuncaq 3y8}7 92 3Y09 (a) pues snosseota uty 03 uty Azan ‘(T/~ 34 ¢) ABsB ay8t] (a) SeTqqed pue satnuesz Apues ‘(7/9 14 OT) 4a8-ystunoaq 34877 (Vv) puss GnEpem *(y/9 44 OT) wAnosq-ysyzmoT Tah 3wy8TT (Vv) pues zjzenb Aq{Tays ATIYyITTS putz ‘(€/2 24 OT) umoaq ated Ara, (v) pues ea GNFpew 03 autzZ ‘(7/9 34 ¢*z) AbIB 3YyBTI [ree (a) seTqqed pue satnuei3 [| J uate pues wnzpeu ‘(9/9 34 ¢*7) wnorq 34877 82 3409 22 3400 (9) 3TF8 ‘(2/9 44 ¢°Z) AvaB-yszuncaq 3y3T7 (v) pues 961802 02 untpaw ‘(T/7 34 OT) Aezd awyst7 (V) 8@TqQqed pus pues 281802 02 untpaw ‘(¢/9 34 QT) uso3q eTeg ines 03 anFpam *(E/{ 24 OT) unoaq azed Azaa| _| (4) seTnuei8 pue pues mntpew ‘(T/, 14 oT) Avr8 a (a) pues autj Artes ‘(2/9 34 ¢°Z) Ava8-ysturoiq 34377 (Vv) pues wnFpem oF auTy ‘(7/2 ak ¢°Z) ABaB yy8qTq (Vv) pues asie0. G2 3409 ve 3YO9 02 GI ol 02 S| Ol 4334 1334 26 S¥3L3W a _ (a) 82@Tqqed yata puss 281809 03 auty *(Z/¢ 324 ¢°Z) UAoIG-ysThelin (Vv) pues 281809 03 untpew ‘(T/7 14 OT) 4e18 3y3TT (a) pues outs AaTKe “(1/9 24 OT) Awa (v) pues entpaw ‘(z/7 34 OT) 4038 3y8p1 Bi (qd) pues auzz 4120 *(T/9 34 QT) kway el (v) pues entpew *(T/, 24 OT) 4038 34877 (V) se@Tnuez3 yIFA pues mnzpew “(9/9 14 OT) aAoaq-yszAoT {at 3Yy8T7 (v) puee @ atdues fae] Gnppew “(9/9 24 OT) uRozq-ystAoT{ed 3Yy8T7 setTqqed pue ‘satnuei3 fa ‘pues untpew ‘(¢/7 14 OT) unoiq ated Arent = Vv) pues untpaw *(¢/7 14 QT) usoiq ated Azonl | S€ 3Yu09 ve 340d €£ 30d (a) pues euty AaTES “(2/9 24 OT) Avant | (@) pues ouF3 “(T/L 34 OT) Sea8 ay8ti] | (a) SeTqqed pue ‘satnuei3 (v) pues =ntpee ‘(1/9 14 oT) A4br9 ee ‘pues esie0od ‘(1/7 14 OT) heaB yYy8T7 (Vv) sauewfe23 {T2Ye pue puss enfpan 4atze “(2/9 1k ¢°z) 4v18-yszunocsaq 34877 (@) 82®TqQ9ed pue ‘setnue18 ‘pues os1800 02 wenzpem ‘(¢/, 14 OT) usorq oTed 10, (a) 8e@TQqed pue ‘satnues8 ‘pues ‘(7/9 14 OT) Aea8-yszunoaq 34877 gl (V) Se Tnuez2 y3za pues asie0D aa haan *(Z/9 3k OT) 4e28-ystunoiq 34877 Ze 34u09 1€ 3N09 O€ 3409 (V) puss esiv02 02 wntpew ‘(7/4 14 OT) anoaq ated 410, 02 S| ol 1333 Zl 02 SI ol 1334 S¥3L3W a) + N SY313W a) N (n) 8@TqQqad pue satnuei8 yaiza atzs Apues ‘(1/9 314 OT) kein} | (a) pues asivos Azan *(1/~ 3h OT) 438 on Lun (9) 3148 puss ‘(1/9 24 oT) co | (qa) pues Aaqze auzz ‘(z/_ 34 ¢-z) Ker ay8ta)___| $s Apues ‘ ak Aea (2) 3T¥8 Apues *(T/9 3h °c) ABip EP ST GED ot (qd) pues outz Arq ts ues auyz ‘ ak Avrd qy8 (etn Oe 28 Gea) Pepe ote [al (a) P ¥3 ‘(Z/L 4 Ot) 4 8T7 : (v) Vv) pues antpaw ‘(¢/¢ 24 OT) uaoiq ated Alaa (v) pues antpam ‘(7/7 34 ¢°7) AvaB qy8t7 | pues untpaw ‘*(¢/7 14 OT) umoaq ated Kray ea I~ 3409 Ov 3Yu09 (a) 82@TqQqQad pue satnuel3 yasA pues unzpew Aaqzs ‘(1/9 3A oT) Avan (9) fet? Aatts “(1/9 34 ) kero] | (n) 829TQqGad pue satnuei3 yaze Aeto Aatys ‘(1/9 3k OT) Ahern (Vv) pues unt pam o3 euzy ‘(z7°¢ AA ¢*z) ABrB 3WystT (Vv) pues asie0. Aan 03 un¢paw *(T/{ IA OT) Aer8 ay8t7 (a) 82TqQqQad pue ‘satnuel8 | ‘pues untpew ‘*(¢/9 34 OT) umoiq eTed 8€ 3409 2Z€ 3409 (9) 3148 Apues ‘(1/9 14 OT) ABD (qd) pues auty *(Z/~ 14 ¢*7) Ava ay8t7 a 6¢€ 3Y09 (n) Sjuewse1z3 TTays auepunge yaFe puss Aaqtts Azan ‘*({/¢ 1K OT) Kean (v¥) satnuelz3 YIFA pues untpamw ‘(¢/¢ 3h ¢*7) umolg 9€ 3YOD 02 GI Ol 1334 02 Gl ol 13334 28 9 S v SY3L3W rO @ SY3LIW oe) N (vy) pues untpaw ‘(¢/, 14 OT) unoaq ated | 2b 3409 (9) at¥s Apues ‘(7/z 44 ¢°7Z) herB 3y8q] (a) pues auty ‘(7/9 34 OT) 4e18-ystunorq war] | (¥) pues untpew ‘(T/~ 14 OT) Ae1a3 ay3T7 (Vv) pues antpem ‘(9/9 14 OT) oTtec-ystunoag] | bb 3409 (aq) pues AaqTT6 euty *(Z/9 14 ¢°Z) 4B1B-ysyuncIg ay8tif—_| (9) 31Fs Apues ‘(7/9 14 ¢°z) Avi8-ystumozq 34377 (Nn) pues suzy Arts *(7Z/9 34 ¢°7) Ava8-ystumocaq 34847 (v) pues unypam 02 autzy *(Z7/~ 3A ¢°Z) A@rB 3WYyBTT 9b 3409 Bupssto a105 €b 3409 O02 Sl (4d) pues asie0> Azan 03 aB1e0d ‘*({/y 14 QT) hea aust _| n (n) pues autzy ‘(Z/~ 44 OT) Aead ay8r__| Ol Hus 4 S (4) pues asie02 Azan 03 361809 ‘(1/7 14 OT) head 3y8tq (9) 3TF8 aoedmos *(7/¢ 3k ¢*7z) Avr wer | (0) Gb 3409 O02 Gl m Olm oH (a) pues auty Aatre ‘(7/9 34 oT) Aea8-yspunoiq 24877 S (v) pues antpaw ‘(7/7 44 ¢°*z) Aea8 1y8t7 0) 2b 3Y09 29 SY313W ro N (a) SeTnuez3 yaza pues asi80d Alaa 02 entpam ‘(¢/9 34 QT) uAoIq ated (a) setqqed pue satTnuei8 yIZA pues a8280> 02 ENTpen Artes *(Z/9 34 OT) Awa8-ystunozq ay8t7 (n) s@Tqqed pue Satnues8 yaza 3ATeS “(1/2 34 OT) Ava8 ay8t7 =) €G 3Y409 (9) Setnuer8 asaeds yam atte ‘(1/9 34 OT) kero} | (V) Puce eervos *(T/y 34 OT) head ay8zu) | (Q) eeTnuez3 pue OS 3409 pues auz3 ATES ‘(£/9 34 OT) unoaq ateg (q) setnuer8 yatA pues autzy ‘(Z/~, 24 ¢°z) AesB ay8t7 (V) pues esiv0d 02 enppem “(7/7 34 ¢°z) Avr8 ay8t7 2S 3Y409 Aatts ‘(7/9 14 oT) Awa8-ystuaocaq 24877 (a) pues out Sl (a) pues Aatts auty ‘(€/9 24 OT) unoaq ateaf | (9D) 3148 Apues ‘(1/9 34 OT) C4 (a) pues out Aatys “(2/9 44 OT) 4828-ystuncaq 34877 (Vv) pues anzpam ‘(7/¢ 14 ¢°7z) Award ay8tq 6b 3409 (Vv) Satnuez8 y3zA pues 281802 ‘(4/9 34 QT) umoiq-ystaotta 3y8t7 (Vv) pues o81805 03 SNtpam “(9/9 3X OT) UMorq-ystmoy{ah ay3t7 1G 3Y09 (9) 31#8 Apues Azan ‘(1/9 14 OT) 419 (n) 3TFS Apues ‘(7/9 34 OT) fe19 (V) pues untpew ‘(¢/9 24 OT) umorg ated (v) pues @81802 ‘(4/9 3k OT) umorq-yszRoTTeh 3y8T7 8b 340d 02 eg 1334 02 Gl Ol 1333 30 SY¥3l3W a) nN (9) Ato Arts Apues *(7/¢ 34 ¢°z) Aes8 ay8ty fees] (n) pues Gntpaw AyTFS Aaa *(7/_ 3K $°Z) 428 34877 (9) 31F8 Apues ‘(1/9 24 QT) AeI9 (Vv) pues anzpamw ‘(7/7 24 oT) Kea8 3y87q Bl 6S 3409 (Vv) pues asi1805 02 wntpaw *(%/¢ 14 OT) wmo1q ated Kray 9S 3409 (@) STT@4ys pue satnuer8 qazm puss e62809 03 wnzpeaw uBatT> ‘(T/~ 34 OT) Aes’ 3437q|__] (9) 3148 Apuee “(T/9 34 ¢) Avan (v) pues auty ‘(¢/9 24 OT) uncaq ated (9) atts Apues “(7/9 24 OT) Ava8-ystunoaq 3y8T7 Vv) pues untpem ‘(¢/7 34 QT) unozq ated Aza (v) pues asavoo ‘ 7 cicenteee (r/c sho) orosar ates naan | _](v) pues unzpam *(9/9 44 ot) notte-ystunoag) _| 8S 3409 2G 3u409 (@) STT2ys pue ‘satqqed ‘saTnuei3 yIzA pues a61809 03 auty Aaqtts *(7/9, 24 O1) Apa8-ystunozo 34877 (9) 31F8 Apues *(T/~, 34 ¢) Kea ay8qq (v) pues antpew *(%/, 14 OT) unoaq ated f1an (Vv) pues autz “(1/2 24 ¢*z) AerB qW8tI (v) pues anzpaw ‘(7/2 34 ¢°Z) Aer8 34y8t7 GS 3409 ¥G 3409 02 GI ol 02 1334 1333 3| SYSLIW oe) Tt Nw SY3L3W ne) (qd) pues SnosoBozw euty *(7/~ 14 ¢°z) Avid wart | (Vv) pues 9s1B0d ‘(4/9 414 OT) umoag-ystmoT{ak 3y43T7 (v) pues wntpew ‘(7/7 44 ¢*z) ABrB 3y8Tq G9 3409 (a) s@tqqed pue Satnueis Apues ‘(7/7 314 ¢*z) Keaa 34877 (9) 31¥8 Apues *(¢/9 44 OT) umoaq ated (N) pues AaqTTs Aran untpem ‘(7/9 14 OT) Aea8-yszumoiq 24877 (9) 3148 Apues *(€/9 44 QT) umoaq ated (Nn) 821qqed pue satnuras 43FA 3TES Apues *(¢/9 34 QT) unoaq ated 29 3409 (Vv) Puse untpaw ‘(¢/9 314 QT) umoaq ated v9 3Y09 (a) pues Bnosoeozm auty *(7/~, 3K ¢*7Z) ABiB syst (2) 3T#s Apues ‘(¢/9 14 g usolq eTB, eae enoovoeoym auty ‘(7/4 14 ¢°z) AerB aati} | (a) pues autz *(¢/9 34 OT) unoaq ateal | (a) pues auty Artes ‘(¢/9 34 OT) umorq ated 19.3409 pues untpam *(¢/7 3A QT) umoig ated Kiay (9) 4eq> katte ‘(1/9 34 OT) ero] | (n) uny pew 02 eutzy *(€/9 IA OT) umoIq ated (9) Apues ‘(2/9 14 g1) Aer8-ystunoig (qa) eauty *(7/9 34 OT) Aea8-yspunc3q 02 +S! : n oln Ho G (¥) O €9 3Y09 02 GI n Olm oH pues G WITS qy8t7T pues 8 2487 0 09 3Y09 S72 SY3SLIW a) + N SY3LIW oe) N 1334 O02 SI Ol (Vv) pues asie0d ‘(7/7 314 OT) Aer’ ay8tq S (V¥) pues asie0> 03 umtpaw ‘(¢/7 1h QT) feI9 v ues o q 1k AeirB 3y38y (v) pues (v) P UTS “(2/2 OT) UST 98180) OF untpam *(T/~ 14 OT) ABB WY BTq7 fe (v) pues 2 (v) pues aut3z “(€/~ 14 QT) umozq ated faant | 981802 02 wntpe@ ‘*(¢/9 4A QT) us01q es ( SE ee EC CALE 0 12 3409 O2 3409 69 3Y409 02 Gl Ol (n) pues auty Aatts ‘(2/9 34 oT) Aea8-ystumoaq 34877 (qd) S@tnuez3 yatm pues asze0d 03 aut ‘(9/9 44 ¢*7) unosrq-ystmoy tak queraf | (n) pues asie0d 03 auty Aatts *(€/9 34 OT) umoaq ated -1G (a) pues autj Aran ‘ ak ¢° o1q-ysyhers TI (2/s S$°7) um a a) (vy) pues asaeo> ‘(Z/9 34 OT) umoaq-ystmortaé aysta___| ‘ 5 é (qd) pues ouzy Azan *(7/¢ IK ¢°7) Abad ay8tq mypaw OF auty *(Z7/~, AK ¢*z) KeaB BITE-D da (0) 3148 Apues *(7/~, 34 ¢*z) Aer8 2y8tq (vy) pues he asie0od ‘(7/9 31k QT) umoiq-ystmoT{ah 1y8T7 13334 89 3409 29 3409 99 3409 SS) S¥Y3L3W a) + N SY3L3W a) i5] (9) 3178 Apues ‘*(7/z 14 OT) Aea8 ay8t7 el (9) atts Apuws “(7/2 34 OT) AerB ay8t7 (v) pues (qd) pues auty Azan *(q/¢ 3h OT) AerB ay8T7 @s1e0> 03 umppaw ‘(T/{ 4A OT) AerB 3ay8T7 (Vv) puve untpam ‘(T/, 324 OT) 4018 34877 (a) pues euty “(1/9 34 OT) cero] | Gd) pues snoasecyw aut ‘ a4 Aeiy Es (a) (1/9 oT) (Vv) pues unzpom *(z/, 34 oT) Ae3r8 3y8T7 (V) pues asaeos ‘(z/~ 314 ¢*z) he18 3y8T7 (Vv) pues asie0d ‘(¢/7 14 OT) 4018 3487 imal 22 3409 92 3Y409 GZ 3Y409 (9) atte Apues “(t/9 34 OT) Aeaoy | (n) pues outs *(Z7/¢ 34 OT) Kvr® aystiy +4 (V) SaTnuei8 yatA pues asie0D 02 wntpem ‘(4/7 14 QT) unoaq ated res S| (v) pues aut3 *(z/~ 44 OT) Awad 3y8z7 (Vv) pues untpem ‘(1/9 314 OT) Aero (v) pues untpam ‘(¢/, 14 oT) unoaq ated ot) (V) S®Tqqad pue satnuer3 yaqtA pues untpam ‘(y/, 14 QT) unoig ated Azant__| (¥) pues a61809 (vy) pues antpew *(¢/¢ 44 OT) umoig ated Kray SS (v) pues untpam ‘(7/7, 34 ¢*z) Kera8 YB 02 wntpem ‘(¢/7 3A OT) umoaqg ated Alay bi 3409 €2Z 3409 22 3Y0d O2 ol 1334 02 SI Ol 1333 34 SY3L3IW re) N (9) 3148 Apues Aran ‘(1/9 34 OT) Sea9y (Vv) pues @nypeaw o3 autzy ‘(1/¢ 24 OT) ABad 32y8T7 (v) puss e61809 02 wntpew ‘(z/_ 14 OT) 4028 3y8T7 €8 3Yu0d (Vv) pues auty ‘(Z/2 44 OT) Aas ay8tT (Vv) pues esaeod ‘(7/¢ 34 OT) AerB ay3z7 O8 34Y09 (n) pues es1v02 AaT{s AyayBt1s ‘(7/9 34 OT) 4es8-yszuaozq 34877 =a) (aq) pues snoacestu auzty ‘(7/9 34 OT) Abin (v) puee asavos ‘(7/~ 14 ¢°z) Avad 3y8T1 28 3409 (q) pues eutz 03 euzy Azan *(7/¢ 34 ¢°7) AeaB 3Wy8t7 62 3409 (Vv) pues untpam ‘(7/, 1k ¢°Z) Avie | 18 3409 (v) pues aut3y ‘(Z2/9 34 OT) 4e18-ystunoiq 14877 82 3409 02 SI a olm o S (0) 02 | n on 4 S (0) 3S) SY3L3W a) Tv WN SY3L3W rm N (9) 3178 Apues ‘(1/9 34 OT) Ava (Vv) satnuei8 YIM pues aeiB0> ‘(y/g 14 ¢*7) unoIg IYy8T7T 68 3Y409 (¥) SaqTnuei8 yatA pues 261809 03 wntpem ‘(¢/7 3A OT) uAo3rq azed Kray (¥) seqTnuei’ yata pues asivod *(¢// 14 QT) uaoiq ated Asanl | (v¥) pues untpam ‘(¢// 1. OT) umoiq ated Azan} | 98 3409 (Vv) pues asi1809 02 wntpaw ‘(y/7 34 OT) unoaq ated Aaa (V) saqtnuez3 pue pues aeivos ‘(y/, 14 QT) unoaq eyed Araqt | (Vv) puss enypem “(y/{ 24 OT) unoaq eted L210, 88 3409 (Vv) puss asis0o 02 wntpam ‘(¢/f 14 OT) umoaq eted Kray G8 3409 02 Gl ol S (v) pues asaeo> ‘(€/9 14 QT) unoaq ateg (Vv) pues asie05 “pauteys-uozy ‘(9/9 14 QT) mot Tak-ystumoig O 28 3Y409 Oc GI Ol (n) pues AqtTays Aran anfFpem 02 auty “(7/72 3k ¢*7) AexB ay8Tq G (v¥) pues autzy ‘(7/7 4K OT) Ker8 ay8Tq (N) pues untpaw o3 autj Aatts haan ‘(2/9 3K OT) Aez8-yszumorq ay8ti|__| (¥) pues asie0. 0] auty AtTaye Aran ‘(€/g 14 QT) umoiq ated fe) v8 3YO9 1334 1333 36 Tv SY3LIWN Ce) SY3L3W ro N 3Y¥09 (4d) pues as1B02 Kian 02 auyy Aatts *(Z/¢ 14 OL) Aer’ ay8t7 (4) pues 96180) 02 anftpaw *(T//, 14 OT) AerB aysty (9) 4TFS (1/9 44 OT) 4eI9 aakey, 32g i] (9) atFe (1/9 34 ot) Aero] | 26 3409 3Y09 (9) 31#8 Apues *(1/9 14 QT) ean (Vv) pues anypem ‘(4/9 14 OT) umoaq-ystmoT{ak ay8t] 16 3409 (J) setTnuez3 yata pues 261809 03 antpaw *(9/9 14 QT) MOT Te4-ystumoag iS (nN) pues asze0> 02 wunzpaw ‘(7/9 14 oy) AeINT ‘it (2) ats Apues ‘(1/9 24 OT) fe19 (V) pues asieo> 02 wntpaw “pouzeqs-uoiz *(¢/g 2K ¢*7~) umoig y1eq 06 3Y09 O02 Ol 02 GI Ol 1333 1334 37 APPENDIX B a GRANULOMETRIC DATA AND CUMULATIVE CURVE PLOTS This appendix contains the results of CERC's Rapid Sediment Analyzer (RSA) size analyses of 180 sediment samples from 64 cores in the study area (see Figs. 2, 3, and 4). Analyses are based on sand-size fractions only. The samples are identified by core number and sample interval below the top of the core. Specific locations of the samples from each core are given in Appendix A. Experience has shown that grain-size values from RSA analyses are con- sistent and slightly coarser than results of dry sieve analyses of identical samples. To relate these RSA data to other sieve data, empirical relations for converting RSA means and standard deviation to sieve analyses equivalents have been determined. The relationships, developed from RSA and sieve analyses at a 0.25-phi interval, are: = 1.0735 x + 0.1876 mean: $RSA Xosieve RSA standard deviation values may be converted to sieve sorting equiva- lents by the formula: standard deviation: oh sieve = 1.4535 oh RSA - 0.146 38 one’s ee? nge*s 6e° 9t0°2 30°% ences gn? Lss*t noe eto°2 10°3 MLo°S me? 9tcr2 tees 629°t 04° 206°% 0S° 95°s 09° 602 $0°% 200°2 90°38 SEO°t tLe 609°? 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The approximate position and extent of these profile sections are shown in Figures C-l and C-2. The vertical scales are in feet and meters and are based on a sound velocity of 1463 meters in water and 1658 meters in sediments. Horizontal scale is variable because of dependence on survey boat speed. The approximate scale can be judged by reference to the plots in Figures A-1 and A-2. On each profile the first line below the zero line is the bottom water interface; all deeper lines are subbottom reflectors. 43 74°20 74°10' Harvey Cedars Ship Bottom 10 ani 159 lis 7 Shool F 166 Little ATLANTIC OCEAN £99 Inlet SCALE Lino L Shool J 67 ,-_463 A A 106 Brigantine Inlet D Bs sigtioe W Sheet | 107 tog | Lise 5 Shoal 6 i 10 Shoal J Lioe & Shoal G-———4 4 Brigantine 38 Beach tts tine’? Shee! ' 33 591-1 Lise 9 Stoo! Absecon Inlet Jae 2, | tine 2 Shoat J Liae A Shoal J 96 83 24 ] Line 4 Shoal K 20 39°20° Figure C-l. 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