07173 - Superb 3.80 Inch OPHIURA SP Brittlestar Upper Ordovician Ktaoua Fm Brittlestars Understanding heteromorph ammonites
Yard notes & kiln story
Description
Understanding heteromorph ammonites
12 Inch = 3
Dalmanitidae
Extremely beautiful specimen of this rare trilobite species
labio-lingually compressed
07173 - Superb 3.80 Inch OPHIURA SP Brittlestar Upper Ordovician Ktaoua Fm Brittlestars Understanding heteromorph ammonitesBeautiful preserved and well prepared specimen. 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.