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| Ilymatogyra arietina / Oyster Slab |
The highly calcareous siltstones of the Del Rio Formation at Washita have huge blocks of Ilymatogyra packed so tightly one specimen overlaps with the next. If you're in the area, it is well worth a field trip.
Wednesday 8 May 2019
ILYMATOGYRA ARIETINA
The highly calcareous siltstones of the Del Rio Formation at Washita have huge blocks of Ilymatogyra packed so tightly one specimen overlaps with the next. If you're in the area, it is well worth a field trip.
