Circular, Issues 382-394The Survey, 1965 - Geology |
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Page 30
... crystalline . 0.6 24. Limestone , fine crystalline ; locally may be entirely cut out by thickening of unit below . gray , coarse grained , very fossiliferous ; beds 1 to 10 inches thick , commonly 1 to 2 inches with shale breaks . 2.6 ...
... crystalline . 0.6 24. Limestone , fine crystalline ; locally may be entirely cut out by thickening of unit below . gray , coarse grained , very fossiliferous ; beds 1 to 10 inches thick , commonly 1 to 2 inches with shale breaks . 2.6 ...
Page 31
... crystalline ; gray , dense beds 3 to 6 inches thick , shale partings . 4. Limestone , light greenish gray , partly very shaly , partly very fossiliferous ; good break at base . 3. Limestone , medium grained , fine to coarse crystalline ...
... crystalline ; gray , dense beds 3 to 6 inches thick , shale partings . 4. Limestone , light greenish gray , partly very shaly , partly very fossiliferous ; good break at base . 3. Limestone , medium grained , fine to coarse crystalline ...
Page 32
... crystalline ; beds 1 to 16 inches thick , with stylolitic partings ; upper 2 feet dolomitic , deep yellowish gray ... crystalline ; good bedding plane at base ( 2.2 feet ) . Limestone , light gray , fine crystalline , becoming darker ...
... crystalline ; beds 1 to 16 inches thick , with stylolitic partings ; upper 2 feet dolomitic , deep yellowish gray ... crystalline ; good bedding plane at base ( 2.2 feet ) . Limestone , light gray , fine crystalline , becoming darker ...
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Common terms and phrases
Alton argillaceous base Battery Rock Bluff Borden Branson & Mehl brecciated brown brownish gray buff calcareous carbonate chert Chesterian clastic clay coal coarse Conodonts County crinoids crystalline deposits Devonian dolomite drilling Dutch Creek Fault feet thick feldspar feldspathic rock fragments Figure fine-grained fluorspar Formation fossiliferous Genevieve Genevieve Limestone Geological Survey glauconitic Grand Tower Grand Tower Limestone granite greenish gray Illinois Basin Illinois Geol ILLINOIS STATE GEOLOGICAL inches thick interval isotopic Karbers Ridge Karbers Ridge Quadrangle light gray Lingle lithographic LOCALITY Louis Limestone lower medium grained mineral Mississippian Missouri Niagaran NW NW NW SW oolitic Ordovician outcrop overlying Pennsylvanian percent potash feldspar Precambrian quarry quartz Rexroad Rosiclare Salem Limestone samples sandy Sangamon Arch sediments shale shaly siltstone silty Silurian soda-lime feldspar strata stratigraphic sublithographic SW sec Taphrognathus texanus thin thin-bedded Total thickness unconformity unit upper Wapsipinicon Willman