"Bentonitic shale Weathered brown gray clay shale 5' "Rusty zone" Dk gray clay shale, rusty zone at base 33" "Rusty zone" Dk gray clay shale, 29" Concretionary 0-10" limestone zone [Ammonite zone A] Ammonites + oysters Gray to black clay shale 1" cave zone with oyster at base (oyster zone 2) Gray to black cl. sh. 5' oyster conc, zone 8" from top, rusty 18" from top, 1" bentonite at base. Gray to dk gray cl. sh., weathered at top, 1" bentonite at base, 6" rusty zone 10" above it. Black, paper thin fissile sh., Rusty zone 18" from base 5 1/2 Covered by slope wash Possible slumping in this interval 2" bentonite 79" G-491 A 43' 16" 32" 27" 15" 22" rusty zone 5 1/2 unexposed Graneros shale sections 491 + 492 Rock Creek Area Pueblo Co, Colo. interval + # of channel sample G-491 B Black fissile cl. sh. (24") Dk qtr to bl. cl. sh. (30") 74" 50" Dense 15 6" fold conc zone with ammonites in top just under conc move some steam fossils + each other Discontinuous exposures gray cl. sh Traverse N 40 E Strike N 55 E Dist 78 SW Dip 140 E (+) Vert drop 6' 4' 4' 10 +/- G-491 C conc ls, conc in conc at top, Amm at top. 6" to 10" Gray shale 6" Bentonite + 8" bent. sh. Gray sh., 35" (Slight weather) Bentonite 1" Dk gray clay shale 72" Bentonite 6" Platey, silty ls with plant frags Black shale 41" Bentonite 2" Black sh. 12" Bentonite 1" Dk gray shale 27" Bentonite 6"-8" bent. sh. Gray sh. 30" correlated in field rusty 53 41" 93" 48" Bentonite 1" silty sh + interc, siltstone 48" G-492 rusty 1' layers platey siltstone 45 [illegible] 3A [illegible] 3B [illegible] 4 10 [illegible] [illegible] [illegible] 13 [illegible] 14 [illegible] 15 [illegible] 16 [illegible] 17 [illegible] 18 2 [illegible] [illegible]