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Mineral Resources > Online Spatial Data > Geology > by state

Maryland geologic map data

[Legend for lithology colors]

View:

Show in a web browser window:

http://mrdata.usgs.gov/sgmc/md.html

Show in Google Earth or download KML:

• mdgeol.kml (8.2M bytes)
• mdgeol.kmz (2.8M bytes)

Show in your GIS using OGC WMS:

http://mrdata.usgs.gov/services/md?service=WMS&version=1.1.1&request=GetCapabilities& [Instructions]

or OGC WFS:

http://mrdata.usgs.gov/services/md?service=WFS&version=1.0.0&request=GetCapabilities& [Instructions]

Use lithology_symbology.lyr ArcGIS layer file to symbolize lithology when using WFS

Download:

Geological attributes:	MDcsv.zip	CSV format
Geologic units:	MDgeol_dd.zip	Shapefile, polygon
Colors for lithology:	lith6_2.style	ArcMap Style [Instructions]

Metadata:

[Outline] - [Questions & Answers] - [Plain text]

Legend indicating the meaning of colors on the interactive map

Publication:

USGS Open-File Report 2005-1325

Preliminary integrated geologic map databases for the United States : Delaware, Maryland, New York, Pennsylvania, and Virginia

http://pubs.usgs.gov/of/2005/1325/

Methodology:

Detailed report of data standardization procedures

http://pubs.usgs.gov/of/2005/1325/documents/CONUSdocumentation.pdf

GIS style files:

Methods used to create several styles for lithology or geologic time

http://pubs.usgs.gov/of/2005/1314/

Sources:

Cleaves, E.T., Edwards, J., Jr., Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, Baltimore, Maryland, scale 1:250,000.

Geologic units in Maryland