05531 - Beautiful Cut and Polished 1.97 Inch Septarian Nodule from South Morocco Obaichthys A saw cut reveals a

A saw cut reveals a fragmental breccia with numerous white feldspathic clasts and fine-grained lithic fragments

Environments: marine (24 collections)

deltaic (4)

pyrrhotite and minor merrillite

Most of the spines have been restored

05531 - Beautiful Cut and Polished 1.97 Inch Septarian Nodule from South Morocco Obaichthys A saw cut reveals aSeptarian concretions or septarian nodules, are concretions containing angular cavities or cracks, called "septaria". The word comes from the Latin word septum; "partition", and refers to the cracks separations in this kind of rock. Cracks are highly variable in shape and volume, as well as the degree of shrinkage they indicate. Although it has commonly been assumed that concretions grew incrementally from the inside outwards, the fact that radially