| OCR Text |
Show 110 LADDER CANYON SECTION Mesa County, Colorado T. 12 S., R. 100 w. sections 19 and 31 April, 1948 (Measured by Clifford No Holmes) Summerville formation: Sandstone; light brown, medium-fine grained quartz, ripple marks, tight cement, calcareous, hard, resistant, thin shale between this and last sandstone interval .•...••••• Shale; erownish-gray, scattered medium size, wellrounded quartz grains •••••••••••••••••••••• Bentonitic clay ••••••••••••••••••• Shale; gray-green, well fractured, limestone concretions •••••••••••• Bentonitic clay •••••••••••• ••••••••••••••• Shale; gray-green, limestone concretions .•.•••••••.• Limestone; arenaceous, carnelian chert encrusting top .1'... Shale; graygreen, silty, limestone concretions, ..• 0 0 0 0 Q •• ••••••••• 0 It •••••••• 0 • 0 0 Q 0 " • • well-fractured Bentonite ; white 0 •• • • • • • • .•.... 0 5.6 43.8 3.4 38.8 1o_2 3504 0.3 25.2 0.7 0.3 24.9 24.2 1.5 23·9 0.4 22.4 1.6 04 1.8 22.0 20.0 7.0 18.2 0.2 11.2 8 5 11.0 2.1 2.5 004 •..............•••.......•.•• Sandstone, light brown, speckled sandstone, medium-coarse quartz and black chert grains, chert very angular, fine ripple marks 0 0 • • 0 • • • • • • • • • • • • • • • • • • • • • • 0 •••••••••••••••••••••••••• •••••••• 0 • 0 ••••••••••••••••••••• Shale; gray-green, silty, well-fractured .•....•..••• Shale; greenish, medium to very fine grains, dark red, h:;i..ghly fractured •................••.•.•••• Sandstone; green, clear quartz grains, fine to very fine grain size, clusters of several grains form larger tightly cemented balls Shale; dark red, arenaceous, fine to medium grained, scattered coarse quartz grains are amber and white, .2' dark maroon clay shale Shale; amber color grains in limonite stained rock, white grains in green rock, arenaceous, quartz grains silt to medium sized, poor sorting, concretionary beds with limestone centers, center, hard, dark gray color .••••••••••••••••• Sandstone; white-purple-red mottled, very wellrounded quartz grains Sandstone; very limonitic, sand grains stained or "varnished" amber color, well-rounded. .....• •••• ......••• 0 •• 0 • 0 ••• 0 0 0 .. 0 0 ..... 0 2 •• 0 •••• 0 2 • Contact with Entrada: Distinct change in color and slope, iron stained and shaly, highly ferruginous sandstone as though exposed for a period of time .. .. .. 20.4 |
