Maps

Fundamental Science Practices

USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.

Our programs produce accurate geologic maps and 3-D geologic frameworks that provide critical data for sustaining and improving the quality of life and economic vitality of the Nation. They also organize, maintain, and publish the geospatial baseline of the Nation's topography, natural landscape, built environment and more.

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January 1, 1989

Maps showing percent of sandstone and total thickness of sandstone in the Westwater Canyon and Brushy Basin Members of the Morrison Formation, San Juan Basin, New Mexico Maps showing percent of sandstone and total thickness of sandstone in the Westwater Canyon and Brushy Basin Members of the Morrison Formation, San Juan Basin, New Mexico

No abstract available.

January 1, 1989

Maps showing Quaternary geology of the northern Maryland part of the Chesapeake Bay Maps showing Quaternary geology of the northern Maryland part of the Chesapeake Bay

No abstract available.

Chesapeake Bay Activities

January 1, 1989

Maps showing Quaternary geology of the northern Virginia part of the Chesapeake Bay Maps showing Quaternary geology of the northern Virginia part of the Chesapeake Bay

No abstract available.

Chesapeake Bay Activities

January 1, 1989

Maps showing Quaternary geology of the southern Maryland part of the Chesapeake Bay Maps showing Quaternary geology of the southern Maryland part of the Chesapeake Bay

No abstract available.

Chesapeake Bay Activities

January 1, 1989

Maps showing structure contours at the base of the Dakota Sandstone, paleotopographic contours at the base of the Westwater Canyon Member of the Morrison Formation, and inferred actively rising structures and depocenter axes during Jurassic time, San Juan Maps showing structure contours at the base of the Dakota Sandstone, paleotopographic contours at the base of the Westwater Canyon Member of the Morrison Formation, and inferred actively rising structures and depocenter axes during Jurassic time, San Juan

No abstract available.

January 1, 1989

Maps showing the ratio of sandstone to mudstone and the number of mudstone interbeds in the Westwater Canyon Member of the Morrison Formation, San Juan Basin, New Mexico Maps showing the ratio of sandstone to mudstone and the number of mudstone interbeds in the Westwater Canyon Member of the Morrison Formation, San Juan Basin, New Mexico

No abstract available.

January 1, 1989

Maps showing trace-element geochemistry of the Sangre de Cristo Wilderness Study Area, south-central Colorado Maps showing trace-element geochemistry of the Sangre de Cristo Wilderness Study Area, south-central Colorado

A trace-element geochemical study of the Sangre de Cristo Wilderness Study Area included the collection of 710 heavy-mineral-concentrate samples, 767 minus-80 mesh stream-sediment samples, and 145 rock samples. All samples were analyzed for 31 elements by semiquantitative emission-spectrographic methods, and some stream-sediment and rock samples were also analyzed for selected elements...

January 1, 1989