This document provides an overview of geologic maps and the symbols used to depict different geologic features on maps. It includes examples of geologic maps showing horizontal and inclined rock strata, domes, basins, plunging folds, faults, and unconformities. It also presents a satellite image demonstrating folded sedimentary rocks in the Appalachian Mountains.

1. Geologic Maps
Geology 100
Geology for Environmental Scientists

2. Geologic Map of the US

3. Symbols found on geologic maps

4. Horizontal Strata

5. Geologic map of
part of the Grand
Canyon. Each
color represents a
different
formation.

6. Inclined Strata

7. Dome

8. Geologic map
of the Black
Hills of South
Dakota, a large
structural dome.

9. The Black Hills of South Dakota are a structural dome.

10. Basin

11. Bedrock geologic map of the Great Lakes region

12. Michigan Basin

13. Surficial geology map of the Great Lakes region

14. Plunging Folds

15. Geologic
map of
Valley and
Ridge of
Pennsylvania

16. Satellite image of
central
Appalachians
Area in last
picture

17. False color satellite image of folded sedimentary
rocks, central Appalachian Mountains.

18. Faults

19. Geologic map of thrust belt in Montana

20. Angular
Unconformity

21. Geologic Map
of the southern
Appalachians.
Note the
Nashville
Dome, folds,
faults, and an
unconformity.

22. Method for constructing a geologic cross section