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, 43.5M)

iageol.kmz (Compressed, 15.0M)

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
Geologic units and attributes	IA.zip	SHP + CSV format

Documentation

Metadata:

Outline - Questions & Answers - Plain text - XML

Legend indicating the meaning of colors on the interactive map

Publication

USGS Open-File Report 2005-1351

Preliminary integrated geologic map databases for the United States: Central states: Montana, Wyoming, Colorado, New Mexico, North Dakota, South Dakota, Nebraska, Kansas, Oklahoma, Texas, Iowa, Missouri, Arkansas, and Louisiana

Methodology

Detailed report of standardization procedures

GIS style files

Methods used to create several styles for lithology or geologic time

Sources

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