3.45" Paleocene Fossil Ginkgo Leaf with Winged Walnut - North Dakota

This is a beautifully preserved fossil ginkgo leaf (Ginkgo cranei) with a winged walnut (Cyclocarya brownii) fruit from the Sentinel Butte Formation of North Dakota. They are finely detailed and the light preservation contrasts well against the dark orangish-brown rock. The reserve side aso contains ginkgo leaf impressions.

This specimen comes with an acrylic display stand.

During this time in the Paleocene epoch, the Ginkgo genus was only represented by a single polymorphic species, formerly described as Ginkgo adiantoides. In 2012, the taxon Ginkgo cranei was assigned in place of Ginkgo adiantoides. This species was distributed in much of the northern regions of North America, which had a hot, humid climate at the time. Its leaves were virtually indistinguishable from modern-day Ginkgo biloba. These species of Ginkgo went extinct approximately 7 million years ago.
Ginkgo cranei & Cyclocarya brownii (Fruit)
Morton County, North Dakota
Sentinel Butte Formation
Leaf: 3.45" wide, Rock: 6.95 x 5.6"
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