30137 - Extremely Rare 0.57 Inch Pyritized Weberides Carboniferous Trilobite - UK Brachyaspidion sulcatum is an important tectosilicate mineral

is an important tectosilicate mineral which forms igneous rock

Samples (polished thin-sections) also were studied under scanning electron microscope (Research Technical Services – UA)

very difficult to find

- Azurite is one of the two basic copper carbonate minerals

Abbreviation: NWA 10023

30137 - Extremely Rare 0.57 Inch Pyritized Weberides Carboniferous Trilobite - UK Brachyaspidion sulcatum is an important tectosilicate mineralWeberides, Reed 1942 (trilobite) Trilobita Proetida Proetidae PaleoDB taxon number: 21408 Parent taxon: Proetidae according to P. A. Jell and J. M. Adrain 2002 See also Sepkoski 2002 Sister taxa: Aayemenaytcheia, Ameropiltonia, Analocaspis, Archegonus, Australokaskia, Basidechenella, Belgibole, Benesovella, Bohemiproetus, Bollandia, Breviphillipsia, Carbonocoryphe, Carbonoproetus, Chaunoproetus, Chlupacula, Chuanqianoproetus, Comptonaspis,