The stratigraphic cross sections presented in this
report were constructed as part of a project conducted by
the U.S. Geological Survey to characterize and evaluate the
undiscovered oil and gas resources of the Wind River Basin
(WRB) in central Wyoming. The primary purpose of the
cross sections is to show the stratigraphic framework and
facies relations of Cretaceous and lower Tertiary rocks in
this large, intermontane structural and sedimentary basin,
which formed in the Rocky Mountain foreland during the
Laramide orogeny (Late Cretaceous through early Eocene
time). The WRB is nearly 200 miles (mi) long, 70 mi wide,
and encompasses about 7,400 square miles (mi2) (fig. 1). The
basin is structurally bounded by the Owl Creek and Bighorn
Mountains on the north, the Casper arch on the east, the
Granite Mountains on the south, and the Wind River Range on
the west.
