Left) Opal-CT lithic material from a thin (10-15 cm) ledge of rock uncovered at Fort Johnson, Vernon Parish, LA. It is possibly Fleming opal. Right) Banded Alibates flint from the Texas Panhandle. #Archaeology#geology
@James Green excellent, thank you! I would have thought there is a similarity regarding the glassiness of opal and flintstone. Is that silica in both cases?
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