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Showing results for tags 'rocky point member'.
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Here are a few of the dolomitic pseudomorphs I mentioned in an earlier post. They form at the contact between the Rocky Point and Island Creek Members of the Peedee Formation. Dolomite apparently migrates from the Island Creek member to fill voids in the top of the Rocky Point member. Before its formal description the Island Creek Member was called the dolosilt. Drag line operators at local (Castle Hayne) quarries call it gumbo clay. The Island Creek is a nuisance because it lies between two usable (fit for the crushing mill) rock units. As nearly the oldest unusable unit exposed in the quarry it is often on the top of the spoil heaps. The Rocky Point Member is product rock so it isn't always easy to find a frag from the contact with these pseudomorphs.
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- island creek member
- maastrichtian mollusks
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