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The County Well Index database was initiated by MGS, and is now a collaborative effort of MGS and the Minnesota Department of Health (MDH). Much effort is committed to compile, add value, and distribute data from drilling done mostly by well contractors across the state. The MGS role is in categorization and correlation of materials intersected by drilling, as MDH administers well regulation. This GIS-based system contains basic information for over 540,000 wells drilled in Minnesota, and single-copy paper records are on file for about 100,000 additional sites. The entire well record including construction information such as casing, screen and pump information, hydrologic data, and descriptions of geologic materials...
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Collection includes rock cores extracted during drilling operations by Billiton Metals and Ores for tin exploration in Waterville, Winslow. Please contact the Maine Geological Survey to discuss access to the collection.
mdEditor custom profile definition files, startup files, etc., may be found here.
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Collection of scanned mylar overlays and topographic field maps displaying outcrop, structural measurements, traverses, and geologic units.
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Collection of data from the Lead-Zinc District of Northwestern Illinois. Collection includes borehole data, driller logs, descriptive logs, formation tops, and downhole lead, zinc, and iron concentrations from mining operations circa 1900-1980. Sources of the collection include original mining company records and maps, maps and logs from the US Bureau of Mines "Illinois Mineral Development Atlas", and Illinois State Geological Survey records.
Categories: Physical Item; Types: Collection; Tags: ndc_collection
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Static metadata (current to August 2018) of Minnesota's borehole geophysical log collection maintained by the Minnesota Geological Survey. This collection is web-accessible through the MGS Open Data Portal at https://z.umn.edu/borehole_geo, where users can obtain the most up-to-date information pertaining to old and new borehole geophysical logs and download corresponding PDF and LAS files for each log (if available). The Borehole Geophysical Database (BGD) is a collection of over 7000 borehole geophysical logs of water wells and drill holes throughout Minnesota. Database collections reside at the Minnesota Geological Survey (MGS) and are continually maintained and expanded upon by MGS staff as part of MGS mapping...
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The Karst database is now (06/30/2020) being managed by the Minnesota Department of Natural Resources, Ecological and Water Resources. Since the early 1980s, the partner agencies have been mapping karst features and publishing various versions of their results in the form of 1:100,000 scale County Geologic Atlases. In the mid 1990s, the Minnesota Department of Natural Resources was assigned responsibility for the hydrogeology portions of the County Atlases, and therefore is now responsible for the karst mapping. Sinkhole distribution maps have been published for several counties. The karst feature database has been developed to allow sinkhole and other karst feature distributions to be displayed and analyzed across...
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Collection includes mineral exploration cores originally obtained by the U.S. Bureau of Mines. Exploration for base metals, Mn-slate, alkaline earth elements was conducted. Cores were obtained from the following locations in Maine: Albany, Blue Hill, Brooksville, Buckfield, Hammond, Newry, Spencer Lake, TDR2, T9R3. Please contact the Maine Geological Survey to discuss access to the collection.
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Collection of rock cores extracted during drilling operations conducted for the Maine Yankee nuclear power plant in Wiscasset, Maine. The plant has been decommissioned and removed. Spent nuclear fuel remains on site. Please contact the Maine Geological Survey to discuss access to the collection.
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Paper maps, including many original-draft or working copies.


map background search result map search result map Collection of U.S. Bureau of Mines rock cores in Maine Collection of Lead-Zinc Mining District Data from Illinois Collection of Well Driller Logs from Minnesota Collection of Billiton Metals and Ores rock cores Collection of Maine Yankee rock cores Collection of Karst Data from Minnesota Collection of Maps from Nebraska Collection of Borehole Geophysical Logs from Minnesota June 3, 2005, Black Mountain Debris Flow, SR-14 Damage June 3, 2005, Black Mountain Debris Flow, SR-14 Damage June 3, 2005, Black Mountain Debris Flow, SR-14 Damage June 3, 2005, Black Mountain Debris Flow, SR-14 Damage June 3, 2005, Black Mountain Debris Flow, SR-14 Damage June 3, 2005, Black Mountain Debris Flow, SR-14 Damage June 3, 2005, Black Mountain Debris Flow, SR-14 Damage 2005 Watchman Landslide Movement, Springdale 2005 Watchman Landslide Movement, Springdale 2005 Watchman Landslide Movement, Springdale Collection of Mylar Overlays and Topographic Field Maps in Minnesota Collection of U.S. Bureau of Mines rock cores in Maine Collection of Billiton Metals and Ores rock cores Collection of Maine Yankee rock cores Collection of Lead-Zinc Mining District Data from Illinois Collection of Maps from Nebraska Collection of Borehole Geophysical Logs from Minnesota Collection of Mylar Overlays and Topographic Field Maps in Minnesota Collection of Well Driller Logs from Minnesota Collection of Karst Data from Minnesota