Explore Map Collection

Check out our basemaps

Print a Map Plus

Generate a high-quality PDF

Discover local flora, fauna, geology, and more

Local Flora & Fauna

Learn the ecology of your area

Learn the geologic formation at your feet

Get Started or Sign In

Welcome

Sign up to start exploring the one-of-a-kind Natural Atlas Topo map

Continue with Apple

Or

Already have an account? Sign In

Rock Formations

Measure

Copyright © Natural Atlas | Roads, Buildings © OSM Contributors | Data Sources

Topo

Ecoregions

Public Lands

...

BASEMAPS

Default Weather

Temperature

Smoke

...

WEATHER

Wasatch Formation (WYTw;0)

Geologic Formation in UT, WY, MT

Generate High-Quality PDF

Lithology

Other (39,814 mi²)

Geologic Age

Eocene (56 Ma – 33.9 Ma ago)

Geologic Unit Label

Tw

(Thrust Belt) Main body–Variegated red to gray, brown, and gray mudstone and sandstone; conglomeratic lenses. (in southwest Wyoming) - Drab to variegated claystone and siltstone, carbonaceous shale and coal, buff sandstone, arkose, and conglomerate. In northwestern part of Green River Basin is thick arkosic light-yellowish-tan sandstone intertonguing with pale-green to gray claystone and shale. (in east Wyoming) - Drab sandstone and drab to variegated claystone; numerous coal beds in lower part.

— USGS

Fly Fossil Diptera (order), “True Flies”, “Dipterous”, “True Fly”, “Flies”

237 Observations

Arthropod Fossil Arthropoda (phylum), “Arthropods”

54 Observations

Diplomystus dentatus SPECIES

29 Observations

Tracheophyta PHYLUM

26 Observations

Ostrea soleniscus SPECIES

22 Observations

Taxonomy

Geographic Places

Geological Feature

Geologic Formation

Classified As

Geologic Formation

Wasatch Formation (WYTw;0)

Wasatch Formation (WYTw;0)

Wasatch Formation (WYTw;0)