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Rock Formations

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Topo

Ecoregions

Public Lands

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BASEMAPS

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Temperature

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WEATHER

Marks Formation

Geologic Formation in FL

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Lithology

Geologic Age

Early Miocene (23.03 Ma – 15.97 Ma ago)

Geologic Unit Label

MIsmk

The Lower Miocene St. Marks Formation, named by Finch (1823), is exposed in Wakulla, Leon and Jefferson Counties on the northwestern flank of the Ocala Platform. It is a white to yellowish gray, poorly to moderately indurated, sandy, fossiliferous (molds and casts) limestone (packstone to wackestone). Mollusk molds and casts are often abundant. The St. Marks Formation makes up the upper part of the FAS in part of the eastern panhandle.

— USGS

Buccinidae FAMILY

Taxonomy

Geographic Places

Geological Feature

Geologic Formation

Classified As

Geologic Formation

Marks Formation

Marks Formation

Marks Formation