Geologic Road Sign on Highway 16

Significant Geologic Boundary

A geologic interpretive sign along highway 16 in the Black Hills of South Dakota.

Pictured here from left to right to right: Tom Durkin (SD Space Grant Consortium), Perry Rahn (SDSM&T), Gary Haag (BHNF), John Stamm (USGS),
Mark Fahrenbach (SDGS), Mark Anderson (USGS), and Foster Sawyer (SDSM&T)
(Photo taken August 23, 2013)
Not pictured are: Derric Iles (SDGS), Nuri Uzunlar (Black Hills Natural Sciences Field Station, SDSM&T), Josh Valder (USGS),
Gary Engel (DOT), and John Matthesen (DOT)

GeologicRoadSignRt16-2026 Download

Supporting information below

Lester, J.L., and Rahn, P.H., 2001, Geologic map of the Rockerville quadrangle, South Dakota: South Dakota Geological Survey 7.5 Minute Geologic Quadrangle map 3, scale 1:24,000.