Home
Map
Browse Map
Explore away
Explore Map Collection
Check out our basemaps
Print a Map
Plus
Generate a high-quality PDF
Field Guide
Field Guide
Discover local flora, fauna, geology, and more
Local Flora & Fauna
Learn the ecology of your area
Local Geology
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
Sign up with Email
Already have an account?
Sign In
Waterfalls
Rock Formations
Campgrounds
Trails
Boat Launches
National Parks
State Parks
Scenic Spots
Measure
You must upgrade to measure routes
Start Free Trial
0 ft
Max
0 ft
Copyright
© Natural Atlas
| Roads, Buildings
© OSM Contributors
|
Data Sources
Topo
Ecoregions
Public Lands
...
BASEMAPS
Default Weather
Temperature
Smoke
...
WEATHER
Alluvium (MTQal;0)
Geologic Formation
in
MT
,
ND
Print Map
Generate High-Quality PDF
Lithology
Clay
Sand
Silt
Geologic Age
Calabrian – Holocene (1.8 Ma ago – 2020)
Geologic Unit Label
Qal
Gravel, sand, silt, and clay deposits of stream and river channels, and floodplains.
—
USGS
Fossils
Bivalve Fossil
Bivalvia (class)
338
Observations
JAN - DEC
Baculites
GENUS
180
Observations
JAN - DEC
Inoceramidae
FAMILY
149
Observations
JAN - DEC
Mollusc Fossil
Mollusca (phylum),
“Molluscs”, “Mollusks”, “Mollusc”
135
Observations
JAN - DEC
Gastropod Fossil
Gastropoda (class),
“Gastropod”
80
Observations
JAN - DEC
See All
Taxonomy
Geographic Places
307
Geological Feature
46
Geologic Formation
Classified As
Geologic Formation
Alluvium (MTQal;0)
Alluvium (MTQal;0)
Alluvium (MTQal;0)
Search
Search the outdoors
Map
Plans
Field Guide
Community
My Profile
My Trips
0
My Field Notes
0
Notifications
More
