Browsing by Author "Gowan, Angela S."

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    C-42, Geologic Atlas of Becker County, Minnesota
    (Minnesota Geological Survey, 2016) Bauer, Emily J.; Chandler, V.W.; Jirsa, Mark A.; Marshall, Katherine J.; Gowan, Angela S.; Hamilton, Jacqueline D.; Radakovich, Amy L.;
    A County Geologic Atlas project is a study of a county's geology, and its mineral and ground-water resources. The information collected during the project is used to develop maps, data-base files, and reports. This same information is also produced as digital files for use with computers. The map information is formatted as geographic information system (GIS) files with associated data bases. The maps and reports are also reproduced as portable document files (PDFs) that can be opened on virtually any computer using the free Acrobat Reader from Adobe.com.
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    C-57, Geologic Atlas of Dakota County, Minnesota
    (Minnesota Geological Survey, 2023) Steenberg, Julia R.; Gowan, Angela S.; Staley, Amie E.; Bauer, Emily J.; Francis, Sarah W.; Chandler, V.W.
    A County Geologic Atlas project is a study of a county's geology, and its mineral and ground-water resources. The information collected during the project is used to develop maps, data-base files, and reports. This same information is also produced as digital files for use with computers. The map information is formatted as geographic information system (GIS) files with associated data bases. The maps and reports are also reproduced as portable document files (PDFs) that can be opened on virtually any computer using the free Acrobat Reader from Adobe.com.
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    C-59, Geologic Atlas of Pipestone County, Minnesota
    (Minnesota Geological Survey, 2024) Retzler, Andrew J.; Mayer, Jordan A.; Bradley, Margeurite C.; Chandler, Val W.; Severson, Allison R.; Jirsa, Mark A.; Conrad, Daniel R.; Gowan, Angela S.; Van Berkel, Jordan T.; Francis, Sarah W.
    A County Geologic Atlas project is a study of a county's geology and its mineral and groundwater resources. The information collected during the project is digitized and used to develop maps and database files. The map information is formatted as geographic information system (GIS) files with associated databases. The maps and reports are also reproduced as portable document files (PDFs).
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    RI-68 Quaternary Lithostratigraphic Units of Minnesota
    (Minnesota Geological Survey, 2016-03) Johnson, Mark D.; Adams, Roberta S.; Gowan, Angela S.; Harris, Kenneth L.; Hobbs, Howard C.; Jennings, Carrie E.; Knaeble, Alan R.; Lusardi, Barbara A.; Meyer, Gary N.;
    Much of Minnesota is covered by sediment of Quaternary age that was deposited during numerous glaciations by ice, wind, and water. In this report, we follow guidelines of the North American Stratigraphic Code (North American Commission on Stratigraphic Nomenclature, 2005) to create a framework for establishing formal lithostratigraphic units in Minnesota. We evaluate over 100 lithostratigraphic units that have been identified in Minnesota. Eighty (80) units are considered to be useful lithostratigraphic units of formation and member rank, and these are formally accepted in this report or are recommended to be so in future publications. These 80 units include previously named formal lithostratigraphic units that are recognized and accepted as originally defined, but also formally defined units that we have revised or redefined to better fit into our stratigraphic framework. The remaining lithostratigraphic units have been used informally in earlier reports or are newly named in this report. Additional units that are no longer considered necessary as lithostratigraphic units are abandoned in this report. These units include previously used units of both formal and informal status. Of the 80 lithostratigraphic units recommended to be retained, 47 are formally defined, revised, or redefined in this report. The remaining 33 units are recommended to be formally named in a future Minnesota Geological Survey Report of Investigations.