Miscellaneous Map Series
Persistent link for this collectionhttps://hdl.handle.net/11299/814
The Miscellaneous Map Series represents a variety of Minnesota’s geological features and regions, including simple bouguer maps, lineament maps, and maps of surficial and bedrock geology.
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Item M-199, Bedrock Geology of the Mark Lake Quadrangle, Cook County, Minnesota(Minnesota Geological Survey, 2018) Boerboom, Terrence J; Green, John CPortrays the bedrock geology of the Mark Lake quadrangle which prior to this effort was largely unmapped. The map shows the distribution of the various rock types, locations of bedrock outcrops, and structural attributes of the bedrock. Mapped outcrops were used to constrain the geology for the most part, but mapping was augmented by the use of geophysical maps, and lidar imagery. Lidar was especially useful in locating bedrock outcrops during field work, and also for delineating the various bedrock units during the map compilation stage following fieldwork.Item M-193 Bedrock Geology of the Cavity Lake Fire Area, Boundary Waters Canoe Area Wilderness, Northeastern Minnesota(Minnesota Geological Survey, 2017) Jirsa, Mark, A; Starns, Edward, C; Schmitz, Mark, DThe bedrock geology in this part of the Boundary Waters Canoe Area Wilderness is extremely diverse and unusually well exposed (Fig. 1). Many parts of this area were mapped to varied levels of detail in the 1930s, and more recently in the 1970s and 1980s (see Index Map), with efforts focused primarily along waterways. A severe windstorm in 1999 blew down trees in much of the region, and a delayed result in 2006 was the Cavity Lake forest fire. The fire exposed bedrock and allowed comparatively unencumbered access to interior parts of the map area, creating a unique and time-sensitive opportunity for mapping. Fieldwork and compilation of prior mapping was conducted in 2007 and 2008, and a preliminary map was produced (Jirsa and Starns, 2008). That map is revised here to incorporate subsequent fieldwork and geochronologic analyses, including one new date acquired by coauthor Schmitz. The map portrays bedrock that represents crustal evolution spanning the Neoarchean to Mesoproterozoic Eras (Fig. 2), with an emphasis on structural and stratigraphic relationships in the Neoarchean portion. Neoarchean greenstone-granite terrane of the Wawa subprovince of the Superior Province is represented by a succession of mostly mafic to ultramafic metavolcanic rocks (circa [ca.] 2,700 Ma), unconformably overlain by calc-alkalic volcanic and volcaniclastic rocks (ca. 2,690 Ma), and intruded by the Saganaga Tonalite (also ca. 2,690 Ma).Item M-198 Bedrock Geology of the Devil Track Lake Quadrangle, Cook County, Minnesota(Minnesota Geological Survey, 2015) Boerboom, Terrence J.; Green, John C.Portrays the bedrock geology of the Devil Track Lake quadrangle which prior to this effort was largely unmapped. The map shows the distribution of the various rock types, locations of bedrock outcrops, and structural attributes of the bedrock. Mapped outcrops were used to constrain the geology for the most part, but mapping was augmented by the use of geophysical maps, and lidar imagery. Lidar was especially useful in locating bedrock outcrops during field work, and also for delineating the various bedrock units during the map compilation stage following fieldwork.Item M-197 Bedrock Geology of the International Falls and LittleFork 30' x 60' Quadrangles, northern Minnesota(Minnesota Geological Survey, 2014-09-25) Jirsa, Mark A.; Boerboom, Terrence J.; Chandler, V.W.The map depicts a complex history of volcanism, sedimentation, intrusion, multiple events of migmatization involving partial melting and melt dispersion, and several periods of deformation and metamorphism. It lies within the southern exposed extent of the Archean Superior Province. In northern Minnesota, the province is divided into three major tectonomagmatic terranes known as the Wabigoon, Quetico, and Wawa subprovinces. The publication shows the locations of mapped bedrock outcrops, structural measurements, interpreted bedrock geology in both map and cross-section views, and associated explanations. Ancillary imagery includes maps of regional geologic setting, index of archived mapping incorporated into this interpretation, and schematic depiction of geologic history.Item M-195 Bedrock Geology of the Marr Island and Hovland Quadrangles, Cook County, Minnesota(2013-11-01) Boerboom, Terrence J.; Green, John C.Bedrock geologic map of Marr Island and Hovland Quadrangles, northeastern Minnesota, northshore of Lake Superior.Item M-194 Bedrock Geology of the Twin Cities Ten-County Metropolitan Area, Minnesota(2013-08-01) Mossler, John H.This regional map is partly a compilation of existing maps of bedrock geology in the metropolitan area and partly a remapping of bedrock in areas where the existing maps were out of date because of the acquisition of new subsurface data.Item M-192 Bedrock Geology of the Crane Lake and Brule Narrows 30' X 60' Quadrangles, Northern Minnesota(Minnesota Geological Survey, 2011) Jirsa, Mark A.Item M-191 Bedrock Geology of the Western Gunflint Trail Area, Northeastern Minnesota(Minnesota Geological Survey, 2011) Jirsa, Mark A.Item M-190 Bedrock Geology of the Kadunce River Quadrangle, Cook County, Minnesota(Minnesota Geological Survey, 2011) Boerboom, Terrence J.; Green, John C.Item M-189 Bedrock Geology of the Grand Marais Quadrangle, Cook County, Minnesota(Minnesota Geological Survey, 2010) Boerboom, Terrence J.; Green, John C.Item M-082 Bedrock geologic map of the Cabin Lake and Cramer quadrangles, Lake and Cook Counties, Minnesota(Minnesota Geological Survey, 1994) Miller, James D., Jr.; Boerboom, T.J.; Jerde, E.A.Item M-081 Bedrock geologic map of the Silver Island Lake, Wilson Lake, and western Toohey Lake quadrangles, Lake and Cook Counties, Minnesota(Minnesota Geological Survey, 1994) Boerboom, T.J.; Miller, James D., Jr.Item M-080 Bedrock geologic map of northwestern Minnesota(Minnesota Geological Survey, 1994) Jirsa, M.A.; Runkel, A.C.; Chandler, V.W.Item M-079 Geologic map of Archean bedrock, Soundan-Bigfork area, northern Minnesota(Minnesota Geological Survey, 1993) Southwick, D.L.Item M-078 Quaternary geologic map of Chisago County, Minnesota(Minnesota Geological Survey, 1993) Meyer, G.N.Item M-077 Quaternary geologic map of Sherburne County, Minnesota(Minnesota Geological Survey, 1993) Meyer, G.N.; Hobbs, H.C.Item M-076 Surficial geologic map of parts of Koochiching, Itasca, and Beltrami Counties, north-central Minnesota(Minnesota Geological Survey, 1993) Meyer, G.N.Item M-075 Bedrock geology of the Cook-Side Lake area, St. Louis and Itasca Counties, Minnesota(Minnesota Geological Survey, 1991) Jirsa, M.A.; Boerboom, T.J.; Chandler, V.W.; McSwiggen, P.L.Item M-074 Reconnaissance geologic map of the Northwest Angle, Lake of the Woods County, Minnesota(Minnesota Geological Survey, 1991) Zamzow, C.E.; Morey, G.B.Item M-073 Bedrock geology of Waseca County, Minnesota(Minnesota Geological Survey, 1993) Bloomgren, B.A.