South Dakota AIPG 2024 field trip participants from left to right: Eric Melendez, Eric Jacobs, Lenise Haag, Suzanne Silverson, Bonnie Gilbertson,
Jay Gilbertson, Kim Cowman, Tim Cowman, Rachel Benton, Gary Haag, Foster Sawyer (not shown).
AIPG
South Dakota Section Summer 2024 Field Trip
The Geology of the
Paleozoic and Mesozoic strata Southern Black Hills
Saturday, September 7, 2024
The field trip was led by Dr. J. Foster Sawyer, geologist and
Faculty/Research Scientist at Oglala Lakota College.
The trip included an in-depth look at classic exposures of Paleozoic and
Mesozoic strata in the southern Black Hills of South Dakota.
South Dakota
AIPG 2024 field trip participants from left to right: Eric Melendez, Eric
Jacobs, Lenise Haag, Suzanne Silverson, Bonnie Gilbertson,
Jay Gilbertson, Kim Cowman, Tim Cowman, Rachel Benton, Gary Haag, Foster Sawyer
(not shown).
Trip
participants examine exposures of the Lower Cretaceous Fall River Formation east
of Hot Springs, South Dakota.
Lower Cretaceous
Fall River Formation
Lower Cretaceous
Fall River Formation
Lower Cretaceous
Fall River Formation
Trip
participants discuss the Pennsylvanian – Permian Minnelusa Formation, the
Cascade Anticline, and spring flow contributing to the flow of
Fall River.
Trip
participants discuss the Pennsylvanian – Permian Minnelusa Formation, the
Cascade Anticline, and spring flow contributing to the flow of
Fall River.
Trip
participants discuss the Pennsylvanian – Permian Minnelusa Formation, the
Cascade Anticline, and spring flow contributing to the flow of
Fall River.
Trip
participants discuss the Pennsylvanian – Permian Minnelusa Formation, the
Cascade Anticline, and spring flow contributing to the flow of
Fall River.
View of features formed by
dissolution in the Minnelusa Formation including breccia pipes and collapsed
beds.
Dissolution
features in the Minnelusa Formation
Permian
Minnekahta Limestone
Historical graffiti carved into
Minnekahta Limestone west of Hot Springs, South Dakota.
Trip participants investigate the
Minnekahta Limestone
Permian
Minnekahta Limestone
Jurassic Canyon
Springs Member of the Sundance Formation, Fall River County, South Dakota.
Historical cable
tool drill rig
Historical cable
tool drill rig
Ripple marks and
bioturbation in the Hulett Member of the Sundance Formation.
Trip
participants examining the Hulett Member of the Sundance Formation on the
southwestern flank of the Black Hills Uplift.
Hulett Member of
the Sundance Formation
Hulett Member of
the Sundance Formation
Folded, faulted
strata of the Hulett Member of the Sundance Formation
Folded, faulted
strata of the Hulett Member of the Sundance Formation
Folded, faulted
strata of the Hulett Member of the Sundance Formation
Trip leader Foster Sawyer discusses
the Turner Sandy Member of the Carlile Shale southwest of Edgemont, South
Dakota.
Looking at
fossils in the Turner Sandy Member of the Carlile Shale.
Looking at
fossils in the Turner Sandy Member of the Carlile Shale.
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