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

Lance Formation (WYKl;0)

Geologic Formation in WY, MT

Generate High-Quality PDF

Lithology

Other (2,125 mi²)

Geologic Age

Late Cretaceous (100.5 Ma – 66 Ma ago)

Geologic Unit Label

Kl

(North Wyoming) - Thick-bedded buff sandstone and drab to green shale; thin conglomerate lenses. (South and Northeast Wyoming) - Brown and gray sandstone and shale; thin coal and carbonaceous shale beds.

— USGS

Bivalve Fossil Bivalvia (class)

52 Observations

Baculites GENUS

40 Observations

Grapevine Fossil Vitaceae (family)

35 Observations

Placenticeras GENUS

30 Observations

Meniscoessus GENUS

30 Observations

Taxonomy

Geographic Places

Geological Feature

Geologic Formation

Classified As

Geologic Formation

Lance Formation (WYKl;0)

Lance Formation (WYKl;0)

Lance Formation (WYKl;0)