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The Field Notes collection mainly consists of hand-written descriptions of outcrops, measured sections, gravel pits, and other geologic sites in Iowa. The majority of these notes were contained in paper files, organized by county. Pertinent information from the files was entered in the GeoSam database and associated documents were scanned and uploaded for public view.
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This collection houses well logs and construction data for water wells, exploration holes, gas storage structures, geotechnical borings, etc. The collection includes but is not limited to: drilling logs, down-hole geophysical logs, and striplogs (lithologic and stratigraphic logs produced by the IGS). This collection represents data from paper files that complement our cuttings/core collections. Together, they comprise much of the basic, raw geologic data for the state.
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This collection contains unpublished, working maps, and cross-sections from a wide range of projects. Some of the documents date back to over 50 years ago. Many of these documents are scanned.
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This collection includes rock cores from oil & gas exploration, public and private water wells, etc. IGS GeoCore tracks cores in the IGS’ Rock Library. GeoCore stores depth intervals, storage location, and high-resolution photographs for each core stored.


    map background search result map search result map Collection of Geologic Maps from Iowa Collection of Rock Cores from Iowa Collection of Geologic Field Notes from Iowa Collection of Geologic Paper Reports from Iowa Collection of Geologic Well Logs from Iowa Collection of Geologic Maps from Iowa Collection of Rock Cores from Iowa Collection of Geologic Field Notes from Iowa Collection of Geologic Paper Reports from Iowa Collection of Geologic Well Logs from Iowa