30695 - Beautiful 0.67 Inch Onnia sp Ordovician Trilobite Tasagnostus debori Pyroxene crystals show complex zoning

Pyroxene crystals show complex zoning patterns

This specimen is 100% guaranteed to be a stony meteorite of the general class " chondrite" and almost certainly of the class "enstatite chondrite"

It also forms as an evaporite mineral and as a hydration product of anhydrite

Kobayashi 1936 (trilobite)

All the crocodylomorpha lived in this delta next to fish

30695 - Beautiful 0.67 Inch Onnia sp Ordovician Trilobite Tasagnostus debori Pyroxene crystals show complex zoningOnnia sp, Bancroft 1933 (trilobite) Trilobita Asaphida Trinucleidae Parent taxon: Trinucleidae according to P. A. Jell and J. M. Adrain 2002 See also Sepkoski 2002 Ecology: fast moving low level epifaunal suspension feeder Age range: 460. 9 to 443. 7 Ma