Iowa geologic map data

A GIS database of geologic units and structural features in Iowa, with lithology, age, data structure, and format written and arranged just like the other states.

View

Show in a web browser window:

Show in Google Earth or other KML viewer:

iageol.kml (Uncompressed, 42.8M)

iageol.kmz (Compressed, 14.9M)

List geologic units by state or county

Show in your GIS using OGC web services:

https://mrdata.usgs.gov/services/sgmc2 (WMS, version 1.3.0)

https://mrdata.usgs.gov/services/wfs/sgmc2 (WFS, version 1.1.0)

Download

Content Download Format
Geological attributes IAcsv.zip CSV format
Geologic units IAgeol_dd.zip Shapefile, polygon
Colors for lithology lith6_2.style ArcMap Style [Instructions]

Documentation

Metadata:

Outline - Questions & Answers - Plain text - XML
Legend indicating the meaning of colors on the interactive map

Sources

Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K

Geologic units in Iowa