Dane County's bedrock consists of Cambrian and Ordovician sedimentary rocks - primarily quartz sandstones and dolostones. Quarries in the dolostone in particular can yield specimens of calcite, quartz and dolomite. A few fringe deposits of the Upper Mississippi Valley Zinc-Lead District bear small amounts of galena, sphalerite and associated minerals. Glacial deposits, including glacial lake sediments, obscure the bedrock in most of the county. The diamond referred to below is a 4 carat stone found in morainal sediments near the town of Oregon in 1893.

Madison, a dynamic Midwest American city, is Wisconsin's state capital. An array of building stones are visible in the state capital building. Madison also hosts the main campus of the University of Wisconsin System. Weeks Hall contains U.W.-M.'s highly-ranked geology department and the excellent Geology Museum which has a number of programs and public outreach activities. Madison also houses the Wisconsin Geological and Natural History Survey, at which one can obtain publications and maps about all aspects of Wisconsin geology.

Fossils

There are 23 fossil localities from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences	23
Youngest Fossil Listed	427 Ma (Silurian)
Oldest Fossil Listed	485 Ma (Cambrian)
Stratigraphic Units	Unit No. Occurrences Age Waukesha 9 433.4 - 427.4 Ma (Silurian) Platteville 1 460.9 - 449.5 Ma (Ordovician) Galena 7 460.9 - 449.5 Ma (Ordovician) Oneota Dolomite 6 485.4 - 477.7 Ma (Paleozoic)
Fossils from Region	Click here to show the list.
Accepted Name Hierarchy Age Catenipora genus Animalia : Cnidaria : Anthozoa : Halysitidae : Catenipora 433.4 - 427.4 Ma Silurian Rugosa subclass Animalia : Cnidaria : Anthozoa : Rugosa 433.4 - 427.4 Ma Silurian Milaculum genus Animalia : Palaeoscolecida : Milaculum 460.9 - 449.5 Ma Ordovician Problematica phylum Animalia : Problematica 460.9 - 449.5 Ma Ordovician Dolerorthis genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Hesperorthidae : Dolerorthis 433.4 - 427.4 Ma Silurian Eoplectodonta genus Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eoplectodonta 433.4 - 427.4 Ma Silurian Rhynchonellida order Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida 433.4 - 427.4 Ma Silurian Atrypida order Animalia : Brachiopoda : Rhynchonellata : Atrypida 433.4 - 427.4 Ma Silurian Macluritella uniangulata species Animalia : Mollusca : Gastropoda : Euomphalina : Macluritidae : Macluritella : Macluritella uniangulata 485.4 - 477.7 Ma Paleozoic Gasconadia putilla species Animalia : Mollusca : Gastropoda : Sinuopeidae : Gasconadia : Gasconadia putilla 485.4 - 477.7 Ma Paleozoic Euconia conicus species Animalia : Mollusca : Gastropoda : Sinuopeidae : Euconia : Euconia conicus 485.4 - 477.7 Ma Paleozoic Maclurina bigsbyi species Animalia : Mollusca : Gastropoda : Euomphalina : Macluritidae : Maclurina : Maclurina bigsbyi 460.9 - 455.8 Ma Ordovician Pentamerus oblongus species Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Pentameridae : Pentamerus : Pentamerus oblongus 433.4 - 427.4 Ma Silurian Oneotoceras loculosum species Animalia : Mollusca : Cephalopoda : Ellesmerocerida : Ellesmeroceratidae : Oneotoceras : Oneotoceras loculosum 485.4 - 477.7 Ma Paleozoic Oneotoceras extremum species Animalia : Mollusca : Cephalopoda : Ellesmeroceratidae : Oneotoceras : Oneotoceras extremum 485.4 - 477.7 Ma Paleozoic Oneotoceras madisonense species Animalia : Mollusca : Cephalopoda : Ellesmeroceratidae : Oneotoceras : Oneotoceras madisonense 485.4 - 477.7 Ma Paleozoic
Fossil Localities	Click to show 5 fossil localities

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Dane_County,_Wisconsin
Wikidata ID:	Q502200
GeoNames ID:	5250074

Localities in this Region

Other Regions, Features and Areas that Intersect

References