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Hoyt Park outcrop




View Geologic Outcrops of Wisconsin Map in a larger map

GPS:

43° 4' 9"N, 89° 26' 37"W

Abstract:

This outcrop is a composite of exposures along Bluff Street and in an abandoned quarry just south of the Bluff Street outcrop in Hoyt Park. This is the type section of the Sunset Point Sandstone Member of the Jordan Formation as currently defined (formerly the Madison Sandstone). The upper part of the Sunset Point was first described in 1875. The lower 3 meters and the underlying Van Oser Sandstone were not exposed until about 1960.

Outcrop description

Location verified: 2/14/12
Access verified: 2/14/12

Photo contributor: David Hart

Views of the site:
honeycomb oneota Left: Honeycomb Oneota dolomite.
Right: Fine-grained, oolitic sandstone of Coon Valley Member. (Pen tip at far right for scale.) oolitic sandstone (close-up)
possible stromatolite Left: A possible stromatolite mound near the base of the outcrop. The hammer marks the right edge of the arc.
Right: Vertical fractures in the dolomite. vertical fractures in dolomite



 

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