THE BANNOCK OVERTHRUST 685 
Thickness 
Description Ft. Tn. 
Limestone, gray, banded with ashy gray to black chert........ 100 
(Thickness of Rex chert member 240 feet) 
Shale, dark brown, weathers light brown, not fetid............ I ° 
Phosphate rock, gray, coarsely oolitic, with large pebbles, 
fossils, or oolites near base, some up to 2 inches in 
diameter; phosphoric acid 36.3 per cent...........:... I ° 
Shalewbrowae finely QOL = chin Ss ai ee ee ee ool fo) 5 
Phosphate rock, gray, coarsely oolitic pebbles or oolites 
up to rt inch in diameter; phosphoric acid 36.7 per cent ° 
Shale, brown, weathers gray, in part finely oolitic............. ° 
Clay, yellow, weathered sandy, concretions up to ¢ inch, 3 grades 
IMEOPADOVIEHS MA Leu an tierate Myc aren sales Cc icyalaeta wets ao ee ° 8 
Phosphate rock, brown, medium oolitic, weathers gray; 
PHOSPHORIC acidusicn suMeELCeENt. ce. e ad maces te ah ° & 
Shralesdarky browne PHOSPMAtIChs cs. cect oes dee sac. ome fe) 2 
Phosphate rock, dark brown, weathers gray, medium 
oolitic, single bed; phosphoric acid 29.4 per cent..... 0 5 
Shale, brown, sandy with concretions up to rinch............ fe) 5 
Phosphate rock, gray, coarsely oolitic; phosphoric acid 
Bis! Oy Nel (CAND eave abo We deo dom tne oti oo Gia orale nioto oo I 2 
Shales darkeabrownytoblack finely: Oolitice. - <2 scc..40.an52- oO: 
Phosphate rock, coarsely oolitic; phosphoric acid 35.9 
DETRCE Ie rte easteaty te ven pea ryen scsi sMenelons ey ci eiayetieuel rope eager saa 
Shale, brown, sandy..... Ear AaeUh, Maemretey Ste Poa e tne 
Phosphate rock, medium oolitic. hee 
Shale, brown, weathers gray with bluish Gnee, salle eeliGe. 
Phosphate rock, black, soft, medium oolitic............ 
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ShralembrownmacalcareOushrs arc e clu ose pwee ss caine 4 + hands nts 
Phosphate rock, black, medium oolitic, soft............ 
Shale brown ooliticinythinistreaksig fctics eles. «rs oye 
Phosphate rock, gray, coarse to finely oolitic; phosphoric 
VEGI yen DY Gals «a's w Rolod b Gkes Pas ee ee 
Phosphate rock, brown, finely oolitic, shaly............ 
Phosphate rock, brown, medium oolitic................ 
Shale, brown, with 4-inch streak of oolitic rock near base...... 
Phosphate rock, dark brown, coarse to finely oolitic, 
shaly in places; phosphoric acid 33.2 percent....... ° 
Phosphate rock, gray, coarsely oolitic, includes inch of 
shale near base; phosphoric acid 37 per cent......... ir I 
Wimestonesdrab simapUre set a suey MeN ene eS eine stars ese ae ° 5 
Phosphate rock, medium to finely oolitic.............. ° 3 
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