| Abstract: | The first occurrence of berthierine-bearing flint clays, one Ordovician and one Pennsylvanian in age, is discussed. These flint clays are characterized by a berthierine-kaolinite-boehmite assemblage. The Pennsylvanian flint clay from northeastern Kentucky is more typical in that it occurs in association with coal measures. Meanwhile, the Ordovician occurrence from northwestern Illinois is the oldest flint clay, forming before the evolution of terrestrial vascular plants. |
| Genre: | Article |
| ProdID: | 70022485 |
| Citation Author: | Moore, D. M.; Hughes, R. E. |
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| Citation End Page: | 149 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Clays and Clay Minerals |
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| Citation Number Of Pages: | 5 |
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| Citation Publisher: | Clay Minerals Soc |
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| Citation Search Results Text: | Ordovician and Pennsylvanian berthierine-bearing flint clays; 2000; Article; Journal; Clays and Clay Minerals; Moore, D. M.; Hughes, R. E. |
| Citation Start Page: | 145 |
| Citation Volume: | 48 |
| Citation Year: | 2000 |
| Type: | citation/reference |
| Text: | Ordovician and Pennsylvanian berthierine-bearing flint clays; 2000; Article; Journal; Clays and Clay Minerals; Moore, D. M.; Hughes, R. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 2000 00:00 -0600 |
| Publisher: | Clay Minerals Soc |
