Circular, Issues 429-436The Survey, 1968 - Geology |
From inside the book
Results 1-3 of 36
Page 10
ness . The overlying Brereton Limestone and the underlying nodular limestone form prominent electric log peaks . In this area the No. 5A Coal is not devel- oped , but its position is indicated on the electric log at about 337 feet in ...
ness . The overlying Brereton Limestone and the underlying nodular limestone form prominent electric log peaks . In this area the No. 5A Coal is not devel- oped , but its position is indicated on the electric log at about 337 feet in ...
Page 23
... limestone . An exception to this generalization is the Francis Creek Shale , which occurs between the Colchester ( No. 2 ) Coal and the black shale - limestone unit and which does not everywhere mark the presence of relatively low ...
... limestone . An exception to this generalization is the Francis Creek Shale , which occurs between the Colchester ( No. 2 ) Coal and the black shale - limestone unit and which does not everywhere mark the presence of relatively low ...
Page 19
... limestone in the cyclic sequence of sediments that characterize the coal - bearing rocks . The gray shale , which lies below the position of the limestone and which is associated with low - sulfur coal , is absent , as are the marine ...
... limestone in the cyclic sequence of sediments that characterize the coal - bearing rocks . The gray shale , which lies below the position of the limestone and which is associated with low - sulfur coal , is absent , as are the marine ...
Other editions - View all
Common terms and phrases
20 feet Abbott Fm anomaly aquifer Assistant Chemist Assistant Geologist Associate Chemist Associate Geologist average barrels black shale and/or Blend Cady clay mineral clay products Clerk-Stenographer Coal H coal thickness coke crude oil deposit depth drill Dykersburg Shale electric logs Emeritus Engineer estimated face-channel samples feet thick Fluorspar Franklin County fuel Gallatin County gasoline Geological Survey geothermal gradient gray shale Hamilton County heat Herrin Illinois coals Illinois Geol Illinois State Geological inches Jefferson kaolinite Karnak Keros Cartwright limestone low-sulfur coal million tons mineral products moisture molding sand natural gas NW NW NW SW Pennsylvanian Ph.D Preheat pyritic sulfur Research Assistant Saline County seam soil temperature Spoon Fm Sulfur percent Supervisory Technical Assistant SW NW SW SW Table thermal total sulfur trillion cubic feet U. S. Bureau underclay variation Wabash County White County Williamson County ос ос ос