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— Hematite occurs with siderite in cherty iron formation in exploration pits near Pine Lake in Sec. 23, 26, 27 and 28 T.44N R.3E (Dutton and Bradley, 1970). — Hematite is found in iron formation exposed in pits near Butternut in Sec. 21, 28 and 29 T.41N R.1W
The Wisconsin Geological and Natural History Survey (WGNHS) has been serving Wisconsin for over 100 years. Part of the University of Wisconsin-Madison Division of Extension, we provide objective scientific information about the geology, mineral resources, and water resources of Wisconsin.
Description: Limonite is a general term for a mixture of fine-grained iron oxides, generally dominated by goethite, but also possibly containing hematite, lepidochrocite and other minerals. It forms from the weathering of other iron minerals, and may be precipitated by iron rich surface or ground water.
It is here found with quartz, siderite, minnesotaite, hematite, magnetite and chamosite.(Huber, 1959, USGS, 1976; Laybourne, 1979, Schmidt, 1980). Laybourne describes the stilpnomelane as occurring in “lath-like plates usually arranged in radial, sheath-like aggregates”.
Formula: Fe 2 (MoO 4) 3.n(H 2 O) Orthorhombic Description: Ferrimolybdite forms yellow earthy to fibrous coatings as a result of the oxidation of molybdenite. FLORENCE COUNTY: Found at the Payant-Chrissman prospect pits in the north central part of sec. 33 T.38N.
Wisconsin Geological and Natural History Survey Digital Collection Since its official creation by the state legislature in 1897, the Wisconsin Geological and Natural History Survey has produced a wide range of documents describing the natural history, geography, geology, soils, and groundwater of
the purpose of helping to conserve the expenditure of the “vast sums” now being spent upon the roads of Wisconsin. Wisconsin Geological and Natural History Survey. Bulletin No . xxxiv
In 2017, the Wisconsin Geological and Natural History Survey (WGNHS) received a NGGDPP grant to inventory, preserve, and publicly expose the Lehmann Collection of documents, maps, data, and analyses. Significant time and money were invested by the private company, Ernest K. Lehmann and Associates, Inc. (ELA), to collect and compile the Lehmann exploration data and documents.
6/10/2018 Geologic history, stratigraphy and tectonics The oldest Precambrian rocks in Wisconsin are late Archean quartzofeldspathic gneiss, migmatite and amphibolite up to three billion years old and igneous rock such as the granite of the Puritan Quartz Monzonite. Mafic
Mar 27, 2018 “TEACHERS: this chart is great for helping to determine the texture and mineral makeup of igneous rocks! #geology”
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