Show simple item record Gray, Henry H. 2006-08-17T12:51:55Z 2006-08-17T12:51:55Z 1962-11
dc.identifier.citation Gray, Henry H., 1962, Outcrop Features of the Mansfield Formation in Southwestern Indiana. Indiana Geological Survey Report of Progress 26, 40 p., 8 fig. en
dc.identifier.issn 0097-3645
dc.description Indiana Geological Survey Report of Progress 26 en
dc.description.abstract The Mansfield Formation of early Pennsylvanian age crops out in an area of approximately 1,700 square miles in southwestern Indiana. Three-fifths of the formation consists of sandstone; most of the remainder is finer clastic rocks. Limestone, chert, coal, and iron ore make up approximately 2 percent of the formation. Many similar rock types are found among the several formations upon which the Mansfield unconformably rests, but the assignment of questionable outcrops either to the Mansfield Formation or to an older formation can usually be accomplished with some confidence, because many outcrops contain either diagnostic rock types or indicative rock features. The various rocks of the Mansfield Formation are, for the most part, arranged in a crudely cyclic pattern. The several cyclic units of a region tend to be similar in makeup and different from those of adjacent regions. Three lithofacies that reflect these areal variations can be recognized and are here named: the Shoals Lithofacies is characterized by cross-stratified sandstones, the Bloomfield Lithofacies by gray shales, and the Cannelton Lithofacies by mudstones and thick clays. The distribution of these lithofacies suggests that these rocks were deposited at or near the shoreline, that there was a fairly large delta in the southern part of the outcrop area, and that this delta was an important factor controlling the sedimentary pattern during early Pennsylvanian time. en
dc.description.sponsorship Indiana Department of Conservation en
dc.format.extent 1451389 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Indiana Geological Survey en
dc.relation.ispartofseries Report of Progress en
dc.relation.ispartofseries 26 en
dc.rights This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. To view a copy of this license, visit or send a letter to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 94105, USA. en
dc.subject Stratigraphy en
dc.subject Sedimentology en
dc.subject Lithostratigraphy en
dc.subject Petrology en
dc.subject Mansfield Formation en
dc.subject Pennsylvanian en
dc.subject Indiana en
dc.title Outcrop Features of the Mansfield Formation in Southwestern Indiana en
dc.type Technical Report en
dc.identifier.coden ICGPA9

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