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The Calvert Formation is a geologic formation in Maryland, Virginia, and Delaware. It preserves fossils dating back to the early to middle Miocene epoch of the Neogene period. It is one of the three formations which make up the Calvert Cliffs, all of which are part of the Chesapeake Group.
Diagram illustrating the largest (grey) and most conservative (red) size estimates of the Miocene-Pliocene shark Carcharocles megalodon (sometimes Carcharodon or Otodus megalodon) with a whale shark (violet), great white shark (green), and anachronistic human (black) to scale †Otodus megalodon
Maryland was home to one of the most significant Pleistocene mammal discoveries in American history: the early 20th century discovery of Pleistocene fossils in an Allegany County cave. The Miocene murex snail Ecphora gardnerae gardnerae is the Maryland state fossil. Astrodon johnstoni is the state dinosaur of Maryland.
Fossils from the Calvert Formation, Zone 10, Calvert Co., MD (Miocene) The Calvert Formation is notable for its plentiful fossil shark teeth. Especially popular among "rockhounds" are those from giants such as Carcharocles and the famous megalodon [7] (which is often included in Carcharocles).
Diagram illustrating the largest (grey) and most conservative (red) size estimates of the Miocene-Pliocene shark Carcharocles megalodon (sometimes Carcharodon or Otodus megalodon) with a whale shark (violet), great white shark (green), and anachronistic human (black) to scale †Otodus megalodon
This list of fossil sites is a worldwide list of localities known well for the presence of fossils. Some entries in this list are notable for a single, unique find, while others are notable for the large number of fossils found there.
The Yorktown unconformably overlies the Miocene Eastover Formation, and conformably underlies the Pliocene Croatan Formation. [2] The Yorktown was divided into members by Ward and Blackwelder (1980). These are in ascending order: Sunken Meadow Member, Rushmere Member, Morgarts Beach Member, and Moore House Member. [3]
Virginia, Maryland: Country: United States: Type section; Named for: Choptank River: ... It preserves fossils dating from the Miocene epoch of the Neogene period. Fossils