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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; Otus †Otus asio †Oxydactylus – tentative ...
Polk County can boast more individual fossil recovery sites than any other Florida county due to the phosphate mining concerns. Bone Valley Formation is a prime geologic formation.
Florida fossils are often very well preserved. [1] The oldest known fossils in Florida date back to the Eocene. At this time Florida was covered in a sea home to a variety of marine invertebrates and the primitive whales, such as Basilosaurus. During the later Miocene Florida was exposed as dry land again due to geologic uplift and mountain ...
The unusual teeth of Hemipristis serra are highly prized by collectors because they are often found in sediments in Southern Florida that yield extremely colorful fossil shark teeth. Their outstandingly large serrations make it a favorite and unique collectible fossil.
Hybodonts were first described in the nineteenth century based on isolated fossil teeth (Agassiz, 1837). Hybodonts were first separated from living sharks by Zittel (1911). [ 1 ] Although historically argued to have a close relationship with the modern shark order Heterodontiformes , this has been refuted. [ 2 ]
Any fossils, including fossil shark teeth, are preserved in sedimentary rocks after falling from their mouth. [13] The sediment that the teeth were found in is used to help determine the age of the shark tooth due to the fossilization process. [15] Shark teeth are most commonly found between the Upper Cretaceous and Tertiary periods. [16]
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Fossilized limb bones, and teeth of the Miocene three-toed horse Anchitherium (left) †Anchitherium †Anchitherium clarencei – type locality for species; Ancilla †Ancilla chipolana †Ancilla shepardi; Angulogerina †Angulogerina occidentalis; Angulus †Angulus agilis – or unidentified comparable form †Angulus merus – or ...
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