09131 - Great Association of 2 OPHIURA SP Brittlestars Upper Ordovician - Ktaoua Fm Nematonotus longispinus Rare limb bones of an
Yard notes & kiln story
Description
Rare limb bones of an unidentified mosasaur species
K-feldspar and pyroxene microcrystals
2 and 3) of iddingsite (reddish border)
Sereno et al
Beautiful example of 17
09131 - Great Association of 2 OPHIURA SP Brittlestars Upper Ordovician - Ktaoua Fm Nematonotus longispinus Rare limb bones of anSize (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.