Stratigraphy of the Lower Pierre Shale (Campanian): Implications for the Tectonic and Eustatic Controls on Facies Distributions

Figure 3

Thrusting events of Utah and Wyoming compared to stratigraphic units of the western margin of the western interior seaway. Orogenic thrusting events occur synchronously with transgressions in the basin [23]. The major cycles recognized by Kauffman and Caldwell [11] and generally accepted for the northern part of the seaway are shown, relating thrusting events to the transgression of these cycles. Some of the major stratigraphic units, particularly within the Campanian, are given for the western margin and the distal sediments. Tectonic material compiled from [2, 4, 23].