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Three and one-half miles south of Livingston, Mont . , the Yellowstone River merges from a narrow stretch of valley - the Lower Canyon - about 2 miles long. The river here cuts at right angles across strike of the sedimentaries which dip to H. at 18 to 20. The granite and gneiss at base of the section coxae in just above the Lower Canyon or at upper end. On west side, however, a fault interrupts the suc- cession near base of the section and for some hundreds of yards in vicinity cf this the exposures are imperfect and rocks much broken up. The section as seen on W.side of river follows.- f Feet a. (base) Light-gray limestone with minute oolitic structure frequently developed, and some arena- ceous bands 120 b. Mostly covered . . . . 2C0 o. &. Hard, buff gray. Two sils seen. ague si an limestone mottled with dark- corals of Zaphrentls type only fog- Silurian? • • * ♦ Hard dark-gray limestone and some bands of drab arenaceous rock with obscure bryoaoan corals and Crthothetes cf . ohexaungensis common in one stratum elsewhere barren . . 0 * e. Light-gray to buffish limestone, fossils from 75 f lower 60 feet . •**»***#!«♦ a » 4 * « » 180 1100 •+ f. Light-buff qu&rtaito £ * W * * * t 4*1 70 4 * • Jr * field Season 1907 • m. j£inule July 26 Bozeman, Mont. Ho. 10. Bridger Creek Canyon section, 4 miles E2. of Bozeman a. Red shale and interhedded conglomerate and quartzite h. Buff-colored sandstone and quartzite. Ho fossils except near top where they abound but rock does not permit of extraction. (Garb. ? ) c. Massive to heavy-bedded light-gray limestone . . . d. Thin-bedded, dark-gray limestone in 2-4 inch strata separated by thin films of sandy shale. Garb.? Foss.abt. ........ e. Gray limestone and sandy shale weathering huffish . a-4. Brownish to gray quartzite with red jasper pebbles in upper part a-5. Greenish shales and covered a- 2.. Gray, non-magne sian limestone , thin-bedded feet 50 160 50 +■ 100 + 200 4 220 ■' a-1. Drab shale and limestone 80 BTb.p. 23 Field Season 1907 July 27 Logan , Mont . So, 11. Section opposite Logan, I, aide of Gallatin River. Feet a. Black cr very cl a rk lino stone with seme shale at base# * # • * * » * • » . » * » . . . • . , * 4 o 0 a JL S 4k ©#**#■* *•**«•< 4 * • * b. Dark- colored to nearly black magnesian limestone. Sometimes mottled huffish end blackish limestone. Texture finely saocharoidal. ... . .120 o. Buff, sometimes reddish, sandy shale and shaly yellow limestone near top 45 d. Gray limestone , huffish at base 10 e. Green argillaceous shale with limestone con- cretions. Fossils abt. Bp. dis;j . etc. ..... 60 e~. Gray limestone and shale . 5 f. Buff or yellow cal care ous sandstone becoming a shale in lower naif 30 f . Gray shaly crumbling limestone . 4 g. Hard, gray limestone in 1-4 inch strata (Garb. ) 300 *f Beds show s pretty uniform dip of 45 to M’. and strike of 1,28 B. Fossils are extremely rare in a and b except a small branching coral which is extremely abundant in certain strata. A Favosites was found and a few brachiopods which are pretty certainly Devonian. A piece of fishbone was also found. % Sp. dlsjunotus and Lartlnia are common in the green shale ; also small lame 11 ihranchs . Fb.p. 27 Field Season 1907 &. 1 4 . Kindle PWWjm n wi « m » » » ^n i n ~ * • * 6 » Shale and tii m- b o dd&d fc rowni sh stind s t o hq ( wo a t ho red) f & h o 1 a «* * .LG* 00000m* « * &• ! Jignt-gray magnesian limestone with some dark bands in lower half h. Dark-red sandy shales . . . ♦ » Buf fish-gray, non-magnesian limestone in 1-3 inch laminae separated by thin wavy bands of shale si®, ilar to Yegc limestone of fb.il lipsburg Quadrangle, So fossils seen . • * 9 9 *■9990 Buff-gray hard magnesian limestone, some shaly bands. (There is quite clearly no break in sedimentation between this and the following Jefferson limestone. I'hin bands of j recur in lower 40 feet of the black lime a to no above. ) 'Jefferson limestone! Black magnesian limestone . . . , (A few bands of gray limestone occur through the series bat they are of small importance with ref- erence to the entire mass. Bo fossils seen ex- cept the Byringo por a- like coral so common at Logan. Also ho x el , Bluish gray argillaceous shale and huffish shale, latter in lower half with some limestone bands near middle • *• * * 9 0 0 0 9 0*0 • 0 *00 a* Gray , non-raagne s ian limestone (Madison) • * 0***0 Feet 600 '£■ 6 . ICO 500 20 25 3C 500 200 300 Tie section terminates on Carp Creek with the Madison. The Quadrant quartzite however is wo 11 exposed near the railroad If. of Melrose a mile or two. The be da of above section dip at about 30 to 35 E. and Camp Creek outs the strike at about right angles. lib. p, 38 Field Season 1907 T3 J a Jl i'i I indie Aug . 19 Hyrum , Utah. rovidence . Ko.18. Fry Canyon, 4 miles S. of fiyrum and just E.of Prc Lower limestones near end of canyon are thin-bedded. nearly black. Dip 10 ’-n ri Strike I. and S Light-colored limestone appears above these a. Hear mouth of canyon two or three species of Spirife r and Zaphrentis? occur abundantly in the limestone. They seem to be Carboniferous forms. Aug. 21. Dip HE. 15 ; Strike H.50 W. Kb. p. 39 Field Season 1907 E. M. Kindle Aug. 21. By rum , Utah. Ko,19. Section in K. fork of Blacksmith Fork Canyon, 10 miles E. of Hyrum, Utah. y fr'iX iT’ e e t a. Bluish-gray, flaggy .hard, calcareous shale weathering buff 50 b. Dark-blue limestone , finely crystalline to lithographic in texture 400 4 c. White crystalline limestone (marble generally) in 1-3 beds and worthless from numerous joints .... 280 j* d. Partly covered and limestone 150 j e. Black magnesian limestone, with lighter beds rare (Jefferson limestone) 1200 ^ ' f. Gray limestone 1000 4- * f- I lib. p. 42 Field Season 1907 Ur. . i 0 *T ^ K indie ilo. 21. In the canyon just north of hast iaradise Canyon only dark-blue limestones ( Carb. ? )are exposed below forks of the canyon. Corals are extremely abundant in these (the same as lower part of _e of Avon secti on ) . limestone s ,11. Iaradise Fb.p.44 Field Season 1907 . M. Fin die A ug . 2 2 Ho. 22 . a. b. c. d. Green canyon (raradise of Weeks), 7 miles E Paradise P. 0. .Utah. of Feet 'Shite to light-gray magnesian limestone, locally altered to white quartz and sometimes with chert hands. Sil. fossils IgO Thin- he dded limestone , huff and brownish near top with peculiar concretionary development resembling finely brecciated limestone. Below this are thin- banded blue-gray limestones. General aspect of upper beds is suggestive of Yago limestone of Phillipsburg quadrangle. This series mostly covered 100 bark-blue limestone at base (lb feet) followed by black and dark-gray magnesian limestone gen-' erally with saccharoidal texture partly cov- ered. Corals common in lower part 1100 Gray limestone partly covered (Garb.) 900 ( N , / 4 • V* A. \a/ ^ ViUa \ v »«* U V irb.P‘45 Field Season 1907 S. M. Kindle Logan, Utah. P'7, Logan Canyon. The lower beds exposed at west end of Canyon below the power-house are the black Jefferson limestone and! dip strongly to S. Crossing the E.& 3. axis of the syncline the following section is seen some 8 miles above Logan. Feet a. (base) Lark bluish-gray hard magnesian limestone b. Light-gray or white magnesian crystalline or sub- crystalline limestone more or less massive. Crinoid stems common, also Haly sites and other Sil. fossils, but difficult to extract 275 c. Lark -gray to black magnesian limestones with Haly sites common, also one sp. Pentamerus oblongus 400 d. light to dark-gray , largely non-magnesian, frequent- ly thin-bedded line stone , and interbedded gray and some brownish shales. Limestone with Martinia . 280 e. f. Dark-gray to black heavy-bedded magnesian Cray, mostly non-magnesian limestone (Carb. limestone 260 ) . . . .1000 This Logan Canyon section differs from that of Green Canyon in the absence of any separating formation be- tween b and c. The boundary between e_ anf f is not sharply marked and is rather difficult to fix.