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Sumac Leaf Fossil Rhus nigricans from Hawes Quarry Colorado

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Sumac Leaf Fossil Rhus nigricans from Hawes Quarry Colorado
$55.00

Availability: Out of stock

Rhus nigricans (Sumac)

Age : Eocene (48 Ma)
Formation : Parachute Creek Member / Green River Formation
Locality : Hawes Quarry, Rio Blanco, Colorado

Leaf : 3 x 0.7 cm

Sumacs are shrubs and small trees that can reach a height of 3.3–32.8 ft. The leaves are spirally arranged; they are usually pinnately compound, though some species have trifoliate or simple leaves. The flowers are in dense panicles or spikes 2.0–11.8 in long, each flower very small, greenish, creamy white or red, with five petals.

Sumacs propagate both by seed (spread by birds and other animals through their droppings), and by new shoots from rhizomes, forming large clonal colonies.
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The Green River Formation is famous worldwide for its fossil fish and other associated fauna (reptiles, birds, mammals, & plants). The Green River Fm. also provides us a rare snapshot glimpse into life 49 million years ago.

The preservation of the fossil insects in the Hawes Quarry are just spectacular, some good enough to allow not only identification to family and subfamily, but will sometimes show color patterns, wing venation, and sex-related characters.

This fossil specimen was collected by William Hawes, from his quarry, the Hawes Quarry, in Rio Blanco County, Colorado. The Hawes Quarry has produced some of the most amazingly beautiful insect and plant fossils from the Green River Fm. and these represent the hand selected, choice picks, from Hawes years of collecting in the mountains of Colorado.

Specimen will come with an identification card.

Scientific Classification :
Kingdom: Plantae
Division: Magnoliophyta
Order: Sapindales
Family: Anacardiaceae
Subfamily: Anacardioideae
Genus: Rhus
Species: nigricans

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