The Silurian rocks in Delaware County, Indiana, include, in ascending order, the Salamonie Dolomite, Limberlost Dolomite, Waldron Formation, and Louisville Limestone, and Mississinewa Shale Member of the Wabash Formation, all of the Niagaran Series (middle Silurian).The oldest exposed Silurian rocks are the Salamonie and the overlying Limberlost Formation (lower Niagaran) are exposed in Irving and Eaton quarries. The Salamonie is 25 feet of apparently reefflank rocks within the Salamonie, with primary dips to 20 degrees, are exposed in Eaton Quarry. The Limberlost, averages six feet and is generally brown, vuggy, dolostone.The Waldron and Louisville formations (middle Niagaran), are exposed in Hoyt, Irving, and Eaton quarries. The Waldron averages six feet and is interbedded grey shale and argillaceous dolostone, and is fossiliferous. It is conformably overlain by about 60 feet of Louisville Formation, predominately argillaceous dolostone with nodular chert and fossils.At Buchanan Quarry, 10 feet of grey dolomitic siltstone and shale of the Mississinewa Member, Wabash Formation, comprise the youngest Silurian strata exposed.Correlation of distinct units within the Louisville between Hoyt, Irving, and Eaton quarries shows considerable lateral continuity and general thinning toward the north.
| Identifer | oai:union.ndltd.org:BSU/oai:cardinalscholar.bsu.edu:handle/182247 |
| Date | 03 June 2011 |
| Creators | Glasby, Virginia June |
| Contributors | Roepke, Harlan H. |
| Source Sets | Ball State University |
| Detected Language | English |
| Format | vi, 54 leaves : ill. (some col.) ; 28 cm. |
| Source | Virtual Press |
| Coverage | n-us-in |
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