Harpoceras Ammonite | Germany vert The tissue forming the outermost

The tissue forming the outermost layer of glyptosaurine osteoderms is similar to tooth enamel and is called osteodermine

The preservation of their remains in such environments suggests periodic flooding events or rapid burial in fine sediments contributed to fossilization

which would result in the formal name Panthera tigris spelaea (Groiss 1996)

40mm in diameter

Moon Rock: A piece of the lunar meteorite NWA 11273 Feldspathic breccia

Harpoceras Ammonite | Germany vert The tissue forming the outermostHarpoceras sp. Early Jurassic (180 MYO) Posidonia Shale Holzmaden, Germany Ammonite approx. size: 8. 5" x 7" Plate approx. size: 13. 5" x 10. 25" This Harpoceras ammonite from the Posidonia Shale in Holzmaden, Germany has been compressed on black slate and is partially pyritized. Ammonoids are a group of extinct marine mollusk animals in the subclass Ammonoidea of the class Cephalopoda. These mollusks, commonly referred to as ammonites, are more