Wisconsin – Sedimentary Geology

Upper Cambrian Franconia Formation, La Crosse, WI

March 21, 2020March 24, 2020 by Michael Smith, posted in Sedimentary Geology

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Cross-bedded glauconitic sandstone of the Franconia Formation (Tunnel City Group in local lore) exposed on Grandad Bluff, La Crosse, WI.

Cambrian trace fossils, Mount Simon-Wonewoc Sandstone

March 21, 2020March 21, 2020 by Michael Smith, posted in Sedimentary Geology

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Slab showing large circular trace fossils within the Upper Cambrian Mount Simon-Wonewoc Sandstone, displayed in the entryway of Weeks Hall, University of Wisconsin-Madison.

Van Hise Rock, WI

March 14, 2020March 24, 2020 by Michael Smith, posted in Structural Geology

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reduced file size version (more functional for some computers): van_hise_rock_reduced

Deformed Precambrian strata near Baraboo, WI, showing different deformation styles resulting from different protolith compositions.