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Folders: ROOT > ScienceBase Catalog > National Digital Catalog > Minnesota Geological Survey ( Show all descendants )

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The current database consists of location 9,032 entries. The surface-based, point data include 5,272, 6,939, and 903 density, magnetic susceptibility, and NRM measurements, respectively. Downhole data from 146 drillcore have also been incorporated, yielding an additional 1,145 and 9,622 measurements of density and magnetic susceptibility, respectively. Geologic interpretation of gravity and magnetic anomaly data in a given area is greatly enhanced if density, magnetic susceptibility (MS) and natural remanent magnetization (NRM) data are available for representative rock-types (Chandler and others, 2008). Along with geologic information from outcrop and drill-holes, rock property data help relate geophysical anomaly...
Map Package format. Structure point data set containing locations and structure type, with strike and dip (planar features) and trend and plunge (linear features). The symbology is derived from ESRI Representations associated with the SymbolFGDCLookup table in the geodatabase. Most trends and dips are based on field measurements using Brunton or similar compass. A sun compass was employed in areas of strong magnetic signature, such as iron-formation. Contains bedrock structural measurements acquired by the multiple field geologists over 40+ years. Collected from bedrock exposures and from data transcribed from published and unpublished analog (non-digital) maps. To access the full data set, download using the link...
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An archive of mineral exploration files is maintained by MN DNR at its Hibbing facility MN DNR mineral exploration files archive
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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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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...
Overview map with 11 layers of lines and polygons that can be turned on an off making younger units 'removable' to expose older bedrock units as part of a layered bedrock geologic map of Minnesota. Downloadable layers can be found on the MGS's Open Data portal under the Spatial Datasets, D-05, Layered Bedrock Geology. Check the 11 Layers on the right side of the page and select which layer you would like to download. Mesozoic--Map showing where rocks of Mesozoic (principally Cretaceous age, nominal Jurassic age) mapped or presumed to exist in Minnesota; Paleozoic--Map showing where Paleozoic age rocks are mapped in Minnesota; Precambrian--Map showing the location and type of Precambrian rocks mapped in Minnesota;...
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Minnesota Geological Survey, in cooperation with industry, sampled the State of Minnesota and adjacent regions for till geochemistry and indicator minerals at a 30-km spacing during summer 2004. Within target cells, each a quarter-degree latitude by a half-degree longitude, till from between about 1 and 2 m depth was sampled by filling a 15 liter plastic pail. At a few sites, vertical profiles were collected. In addition, three transects to the north were sampled, to help identify sediments derived by long-distance glacial transport, to obtain reference samples from the Thompson nickel belt, and also to extend sampling to the limit of Hudson Bay-derived carbonate-bearing sediments, to permit comparison to Minnesota...
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All sediment samples from auger holes, outcrops, and cores are processed to determine texture. The 1-2 mm coarse sand fraction is packaged separately, and about half of these fractions are categorized lithologically by a glacial geologist. The data are recorded on paper data sheets and in a database.
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Compiled public domain and donated geotechnical drillhole data; plans call for this database to be merged with sediment composition profiles
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about 90% Precambrian, nearly all related to mapping projects, most from recent decades total to the nearest thousand
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GeMS, the MGS geological mapping system, is a database structure for Precambrian geological mapping projects that is replicated in each new project. The project databases have not been merged into a single database; includes sample sites, structural measurements, and outcrop descriptions
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The Minnesota drill core repository is managed by the Department of Natural Resources, in relation to a legislated obligation to submit a one-fourth portion of core samples obtained for mineral exploration. These samples become property of the state and are stored in the DNR's drill core library, located in Hibbing. The original drill core library was constructed in 1972. The most recent additions were constructed in 1990, and were subsequently expanded in 1995. Construction presently is underway on an expansion. The existing facility contains nearly 2.3 million feet of core, extracted from 79 Minnesota counties during the period from 1905 to the present.
Map document with four rasters showing depth to different bedrock surfaces in Minnesota and continuing into the Lake Superior part of Minnesota. The surfaces are Depth to Bedrock (Quaternary sediment thickness to the top of the Cretaceous); Depth to the pre-Mesozoic surface (bottom of Cretaceous and top of Precambrian and Paleozoic); Depth to Precambrian (beneath the Paleozoic rocks) and Depth to Basement where Precambrian rocks that form Proterozoic basins have been removed and elevations of the new surface have been determined from geophysical data and modeling. Depths have been calculated from the land surface in all cases. These maps also include that part of Minnesota that lies in the western part of the Lake...
GIS data set consisting of more than 200,000 polygons that represent areas where bedrock is at and near the land surface. The attribute table includes descriptions of features if available. The feature data may also include multiple overlapping polygons and differing descriptions at some locations, indicating the historical nature of outcrop mapping in the state.
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Thin sections, nearly all Precambrian rocks, nearly all related to mapping projects; many several decades old total to the nearest thousand
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Paleontological specimens related to University of Minnesota School of Earth Sciences research; about a quarter from Minnesota; includes reference collections for lower Paleozoic of the upper Mississippi valley Stored at the Bell Museum
Geochronology is the science of determining the age of rocks, fossils, and sediments and other materials. This database contains geochronologic data in GIS point format for published geochronological dates on Precambrian rocks, acquired and published by the Minnesota Geological along with selected published dates from adjacent. Compiled by the MGS for distribution. The file contains a full reference for each sample. To view the data on the web just click on this link to the Geochronology sample locations with the Minnesota bedrock geology and topography web map. A second link is provided that shows the geochron sample locations over the bedrock geologic map of Minnesota.
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Static metadata (current to June 2021) of Minnesota's borehole drill cuttings collection maintained by the Minnesota Geological Survey (MGS). This collection of over 5,800 sets of drill cuttings dates as far back as the late 1800s. The collection is stored in our soil lab at our office and is accessible to the public by appointment. Each borehole cutting set is assigned a MGS lab number upon arrival, processed and washed by UMN student soil lab workers, and stored chronologically in cardboard boxes. Each cutting set cardboard box contains multiple paper envelopes representing a sample taken at that depth. Each paper envelope contains ~100-200 grams of original sample and ~100 grams of washed sample processed by...
Geological hand samples and thin section database consists of four datasets. These datasets are the Thinsection locations, 2012 - 2020, Handsample locations, 2012 - 2020, Winchell rock catalog, 2020 and the Pillsbury rock catalog, 2020. All locations are available for viewing and downloading. The MGS hand sample database is a digital database cataloging approximately 45,000 physical geologic hand samples collected in Minnesota over the last 100+ years. Hand samples are property of the MGS and currently reside at the MN DNR core facility in Hibbing, Minnesota. Each sample has the minimum identifying data of Sample ID and location. Many samples are much more fully attributed with data including, but not limited...


map background search result map search result map Collection of Thin sections from MN Collection of Hand samples from MN Collection of Paleontological samples from MN Collection of Geochemical samples from MN Collection of Well driller logs from MN Collection of Rock properties database from MN Collection of Mineral exploration files from MN Collection of Drill cores from MN Collection of Geological mapping data from MN Collection of Sediment textural and lithological data from MN Collection of Karst database from MN Collection of Borehole Drill Cuttings from MN Collection of Geotechnical drilling from MN Collection of Borehole Geophysical Logs from MN Collection of Borehole Geophysical Logs from MN Collection of Thin sections from MN Collection of Hand samples from MN Collection of Paleontological samples from MN Collection of Geochemical samples from MN Collection of Well driller logs from MN Collection of Rock properties database from MN Collection of Mineral exploration files from MN Collection of Drill cores from MN Collection of Geological mapping data from MN Collection of Sediment textural and lithological data from MN Collection of Karst database from MN Collection of Borehole Drill Cuttings from MN Collection of Geotechnical drilling from MN