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and floodplain rocks deposited in a back-arc basin formed inland of a Late Triassic magmatic arc associated with the subduction zone off the west coast of North America
medium to fine ribs that tend to bifurcate about two-thirds of the way out on the flanks
5 in) teeth were shaped like chisels (spatulate) and arranged evenly along the jaw
The specimen has a nearly complete body chamber and some sutures are visible
There are two rows of well-defined tubercles on the flanks
Eocene Green River Gyrocarpus P-GRP2-16-29b Cricket and floodplain rocks deposited inGyrocarpus sp. Green River Formation Middle Eocene Lincoln County, Wyoming This is a very fine example of the fossil laurel relative Gyrocarpus. The specimen seen here has marvelous detail. The leaf is actually complete but one of the lobes is folded over and it appears missing. The venation is distinct and the leaf is a large 17 cm not counting the stem. This example from our collection is museum quality. This specimen was collected from the 18 inch
