09131 - Great Association of 2 OPHIURA SP Brittlestars Upper Ordovician - Ktaoua Fm Nematonotus longispinus Unlike most other chondrites
Yard notes & kiln story
Description
Unlike most other chondrites
Beautiful example of 17
Comments: Approved 11 Oct 2019 Writeup Writeup from MB 108:
and in 1832 F
K-feldspar and pyroxene microcrystals
09131 - Great Association of 2 OPHIURA SP Brittlestars Upper Ordovician - Ktaoua Fm Nematonotus longispinus Unlike most other chondritesSize (Biggest): 128. 2 mm 5. 10 in Beautiful preserved and well prepared specimens. This type of brittlestar is quite representative of the Ordovician of the South of Morocco. Its orange colors come from the limonite (iron oxide) that is the product of the oxidation of the original pyrite that mineralized these fossils.