| Abstract: | Enhanced preservation correlates with early diagenetic concretion formation at or near the sediment-water interface and with higher carbonate, organic material, and metallic cation content than in surrounding rocks. Early diagenetic growth is inferred by diverging sedimentary laminations and small-scale sedimentary structures in fossiliferous carbonate concretions. High initial concentration of microorganisms or fecal pellets may commonly be responsible for incipient carbonate-concretion growth. Excellent preservation is demonstrated by radiolarians and palynomorphs extracted from a carbonate concretion from the Middle Jurassic Shelikof Formation, S Alaska.-from Authors |
| Genre: | Article |
| ProdID: | 70013014 |
| Citation Author: | Blome, C. D.; Albert, N. R. |
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| Citation End Page: | 215 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geology |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Carbonate concretions: an ideal sedimentary host for microfossils.; 1985; Article; Journal; Geology; Blome, C. D.; Albert, N. R. |
| Citation Start Page: | 212 |
| Citation Volume: | 13 |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | Carbonate concretions: an ideal sedimentary host for microfossils.; 1985; Article; Journal; Geology; Blome, C. D.; Albert, N. R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1985 00:00 -0600 |
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