Fossil stratigraphy from middle devonian to mississippian periods?
I’m trying to find fish fossils in Pendleton County, West Virginia. I’ve found a rock quarry that might extend from middle devonian to early mississippian periods. I’m not for sure but it appears to have a yellow colored sandstone overlying a large bed of dark, nearly black, limestone. This limestone contains brachiopods. From the material gathered on the slope below the cliff, the rocks above must have crinoids fragments preserved in black calcite. These are nice slabs of crinoid fragments. Believe that there was fish swimming the seas of this area back then and I’m almost certain that numerous specimens became fossilized in these rocks. What rocks do you expect would be the best to search? I’m thinking somewhere in the the sandstone. Are there any sites that tell me what the stratigraphy is of this area?
I’d bet that your best help could be found at the nearest university. It’s likely that a researcher close by knows that quarry or at least stratigraphy very well and would probably give you a few minutes time if you promised them a look at anything unique you might find. They might be looking for something particular. If not they could at least direct you to the proper papers to be found in their library.
To be very simplified your best bet to look for fossils is by no means sandstone. That would probably be your worst place.
If you think of it sandstone as a beach. Very little preservation potential of a fish on a beach. It’s more likely to decompose while rolling on the waves. The overall stratigraphic regression sounds typical. You have deep water limestones/shales covered by sand. This means the ocean was shallowing and the beach was regressing over the limestone.
It’s possible that there are shaley lenses to be found near the sand limestone contact. I would look there for a couple reasons. They might be outflows or a river delta or something where the energy died off and clastics were deposited. I’m a fisherman and fish love rivers and deltas and things like that. The chance that a dead fish could float down a river and got deposited in the silt then eventually covered with sand is very high. And fossils in shales can be fantastic.
Are you sure the very black limestone isn’t limey shale anyhow?
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