Going online to see a geologic map of your state can be rewarding--or frustrating.
From the Geological Survey of Alabama, presented here with notes from your Guide.
A complicated map of this huge state, presented here at three sizes.
Excerpted from the USGS national map and presented here at two sizes.
A gigantic U.S. Geological Survey map presented here at four different scales.
A classic U.S. Geological Survey map presented here in four different sizes.
Ogden Tweto's beautiful 1979 USGS map presented here at three different sizes.
A large scan of the state map hosted by Wesleyan University.
The generalized map by the Delaware Geological Survey, presented here at three sizes.
A Florida Department of Environmental Protection map presented here at two large sizes.
Created from the USGS database and served here in four sizes.
The Aloha State presented here at three sizes.
A simplified map of this large and rugged state from the state geological survey.
Illinois' bedrock is almost totally hidden but the state geological survey has mapped it all.
Illinois is covered with recent glacial deposits, shown in this map from the state geological survey.
Click on the rock units for details in this Indiana Geological Survey map. Shockwave plug-in required.
A clickable map from the Indiana Geological Survey shows the state's glacial deposits.
A map from the Iowa Geological Survey Bureau shows the state's hidden side.
An Iowa Geological Survey Bureau map with all the glacial details.
A Kansas Geological Survey map presented here at three sizes.
A Kentucky Geological Survey map presented here at two different sizes.
A simple map from the state geological survey.
The hidden, ancient rocks of Maine mapped by the Maine Geological Survey.
Maine's extensive glacial deposits, from the Maine Geological Survey.
The 1968 state geological survey map presented here at three sizes.
A simplified bedrock map and simplified history of the Bay State.
Two different state geological survey maps presented at several sizes.
One of
many from the Minnesota Geological Survey.
A generalized map courtesy of the Gulf of Mexico Program.
A map by the Missouri Department of Natural Resources presented here at two sizes.
The Big Sky State mapped by Montana State University and presented here at two sizes.
Excerpted from the USGS national map and presented here at two sizes.
A USGS map of this geologist's paradise presented here at four sizes.
The Granite State, presented here at four sizes.
From the state Geological Survey.
Mapped by the state Bureau of Mines & Mineral Resources, presented here in two versions.
A large and informative state geological survey map, presented here at three sizes.
Presented here at two sizes.
The state's hidden rocks beneath its glacial drift, presented here at three sizes.
Rocks and glacial sediments cover the state, shown at three sizes.
The Ohio Geological Survey calls this the Old State Bedrock Map but surely the rocks are the same today.
Glacial traces and sediments mapped by the Ohio Geological Survey.
From the Oklahoma Geological Survey.
A classic USGS map presented here in three sizes.
A 2000 state geologic survey map, presented here at three sizes.
A huge map from the Rhode Island State Geologist is presented here at three different scales.
A generalized map from the state Geological Survey.
From the South Dakota Geological Survey; click on an area to see the key.
Presented by the state Department of Environment and Conservation.
A simplified map from the Texas Bureau of Economic Geology presented here at four sizes.
The Beehive State, presented here at four scales.
This map from the Vermont Geological Survey was issued in 1961.
Schematic map and a brief introduction to Virginia geology.
A simplified map of a complex state, presented here in three sizes.
A slightly small version from the West Virginia Geological and Economic Survey.
A small version from the University of Wisconsin Extension.
Glacial deposits of the state from the University of Wisconsin Extension.
Excerpted from the USGS national map and shown at two sizes.
