22227 - Great Collection of 2 Perisphinctes virguloides Late Jurassic Ammonite - Madagascar Olcostephanus 083g of this RARE type

083g of this RARE type of MARTIAN Shergottite METEORITE

Plagioclase is partially altered and twins are common

The quartz is heated to 871 °C (1600 °F) in a vacuum

04 μg/g and Au ~ 1 μg/g

Congosaurus

22227 - Great Collection of 2 Perisphinctes virguloides Late Jurassic Ammonite - Madagascar Olcostephanus 083g of this RARE typeGreat Collection of 2 Perisphinctes virguloides Late Jurassic Ammonite Madagascar. Perisphinctes sp, (ammonite) Cephalopoda Ammonoidea Perisphinctidae Perisphinctes is an extinct genus of ammonite cephalopod. They lived during the Middle Late Jurassic Epochs and serve as an biostratigraphic index fossil for that time period. This species of Perisphinctes comes from the classic locality of the Upper Jurassic (Oxfordian stage) of Madagascar.