Description
606 Grams, 5" x 3" x 2" Rectangle Shape Orthoceras Handmade Brown Jewelry Box from Morocco, MF749
Weight: About 606 Grams
External Length: About 5" or so
External Width: About 3" or so
External Hight: About 2" or so
Location Origin: Atlas Mountains, Morocco
Age of Fossils: 240 Millions -500 Millions Years Old or So
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Wikipedia:
Ammonites (pronunciation: /'*m?na?ts/) are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during theDevonian, and the last species died out during the Cretaceous-Paleogene extinction event.
Ammonites are excellent index fossils, and it is often possible to link the rock layer in which a particular species or genus is found to specific geologic time periods. Their fossil shells usually take the form of planispirals, although there were some helically spiraled and nonspiraled forms (known as heteromorphs).
Orthoceras ("straight horn") is a genus of extinct nautiloid cephalopod. This genus is sometimes called Orthoceratites. Note it is sometimes misspelled as Orthocera, Orthocerus or Orthoceros (Sweet 1964:K222).
Orthoceras fossils are common and have a global distribution, occurring in any marine rock, especially in limestone.
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