Yorktown Formation, Geological formation in Virginia, United States.
The Yorktown Formation contains marine sediments with sand layers and abundant calcareous shells spread across Maryland, Virginia, North Carolina, and South Carolina.
First documented by Clark and Miller in 1906, this formation dates back to the Early and Middle Pliocene period, approximately 5.3 to 2.6 million years ago.
Scientists regularly study the formation's fossil collections, which include numerous marine species such as bivalves, gastropods, corals, and ancient whale remains.
Researchers and visitors can access several exposure sites along the James River, including the Carters Grove Bluffs and Moore House Bluff locations.
The formation contains Chesapectin jeffersonius fossils, designated as the Virginia state fossil, representing the marine biodiversity from millions of years ago.
Made from material: sand
GPS coordinates: 37.20917,-76.63333
Latest update: March 2, 2025 23:21
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