Tagasi otsingusse
Bryan, 1992
Origin and Paleoecology of Maastrichtian Rockground and Chalk Facies in Southcentral Alabama
Bryan, J. R.
DOI | 10.2307/3514796 |
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Aasta | 1992 |
Kirjastus | Society for Sedimentary Geology |
Ajakiri | Palaios |
Köide | 7 |
Number | 1 |
Leheküljed | 67 |
Tüüp | artikkel ajakirjas |
Keel | inglise |
Id | 10338 |
Abstrakt
A phosphatic rocky substrate (rockground) has been recognized at the top of the Ripley Formation, near the town of Braggs. The rockground is developed in a coarse-grained sandstone and is associated with a regional unconformity and probable subaerial exposure (68 Ma sequence boundary). The sandstone was subject to high-energy conditions which produced large, well-rounded cobbles. Thus, at some point, the surface was presumably a rocky shore. The rockground later hosted a low diversity epibiont fauna of bivalves, bryozoans, and serpulid worms. Regular echinoids were common.
Viimati muudetud: 4/17/2020