Filters: Tags: {"type":"Other"} (X) > Date Range: {"choice":"year"} (X) > Categories: Physical Item (X)
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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...
Categories: Physical Item;
Types: Collection,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Minnesota,
density,
magnetic susceptibility,
ndc_collection,
rock-properties
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...
Categories: Physical Item;
Types: Collection,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Geological Collection,
Quaternary,
State,
geochemistry,
indicator mineral,
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.
Categories: Physical Item;
Types: Collection,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Geological Collection,
State,
glacial,
lithology,
ndc_collection,
Hand specimens of rocks collected as a part of field work conducted primarily by present and former WGNHS staff members. Samples date from the early 20th century to the 1990s and were collected throughout the state. Many of the samples are described in the historical field notebook collection, and relationships between the samples and the field notebooks have been established and captured in identifiers. Locations for samples were taken from field notes, maps, and accession lists. There are approximately 5,700 hand samples in this collection.
Categories: Data,
Physical Item;
Types: Collection,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Geological Collection,
Hand samples,
Paleozoic,
Physical Item,
Precambrian,
This collection consists of field notebooks created by the personnel of the Minnesota Geological Survey (MGS) and its predecessor, the Minnesota Geological and Natural History Survey (MGNHS). The notes include basic data used to compile annual reports and bulletins on geological matters. For a description of the extent of geological work performed during the eras of the MGNHS and MGS, consult George M. Schwartz, “History of the Minnesota Geological Survey,” which identifies the individual studies made by officers of the survey between 1872 and 1963. The MGS was a major source of funding for faculty research, which focused on field petrology, mineralogy and economic geology and aligned to the individual professional...
Categories: Data,
Physical Item;
Types: Collection,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Minnesota,
field,
geology,
notebooks,
notes
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