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Green River Fish Mortality Plate | Wyoming, USA
Green River Fish Mortality Plate | Wyoming, USA
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€11.500,00 EUR
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- Origin: Green River Formation, Wyoming, USA
- Size: H122.5cm W76cm D8cm
- Age: Eocene, 50 million years old
- Description: Diplomystus dentatus, Priscacara sp. (Cope, 1877), and Knightia eocaena. The limestone layers of the Eocene deposit of the Green River Formation are a rare location where conditions were right for a rich assemblage of undisturbed fossils. The present specimen is a classic fish mural from this popular American fossil locality, comprising: one Diplomystus dentatus, length 30 cm; one Knightia eocaena, length 34 cm; and three Priscacaras, an extinct temperate perch, ranging in length from 11 to 13 cm.
- Additional Information: In the Green River Formation of southwestern Wyoming, in the area known as Fossil Lake, two distinct zones of very fine-grained calcareous muds are particularly noted for preserving a large number of complete and detailed fossils. These layers are an Eocene deposit, a rare location where conditions were right for a rich assemblage of undisturbed fossils. The richest zone, called the split fish layer, consists of a series of layered or corrugated calcareous muds about 6 ft (1.8 m) thick that contain abundant fish and other fossils. These are easily split along the layers to expose the fossils. This thin zone represents about 4,000 years of deposition. The second fossil zone, the 18-inch layer, is a non-laminated layer about 18 inches (46 cm) thick that also contains abundant detailed fossils but is more difficult to work with because it is not composed of split layers.
