07175 - Superb 5.04 Inch OPHIURA SP Brittlestar Upper Ordovician Ktaoua Fm Geological Samples It still preserves a thin

It still preserves a thin layer of the gravelly natural sediment in its surface

Environments: marine

Great Collection of 4 Huge specimens

The Ouled Abdoun Basin (or Khouribga Basin)

Multiple articulated stalks can be seen

07175 - Superb 5.04 Inch OPHIURA SP Brittlestar Upper Ordovician Ktaoua Fm Geological Samples It still preserves a thinBeautiful 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.