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The La Brea Tar Pits are composed of heavy oil fractions called gilsonite
Blue Lace Agate Teardrop Cabochon
Cenoceras had a relatively simple
laterally compressed fish exhibiting a sunfish-like profile
Fossil Fern | Alethopteris grandini | Kansas wooly mammoth The La Brea Tar PitsAlethopteris grandini Pennsylvanian, Carboniferous Stranger Formation Franklin Co. Kansas Rick Rolater Collection Specimen measures approx. 4" x 1. 5" Matrix measures approx. 8. 5" x 6. 5" x 3" This spectacular fern specimen is very detailed and the preservation is impeccable. Alethopteris grandini is a classic and widely recognizable Pennsylvanian age seed fern (Pteridosperm) commonly found in the Carboniferous coal measures of North America and
