Controls on
Accommodation in Retroarc Foreland Systems: Case
Study of The
Mumpy, Andrew J.1,
Octavian Catuneanu1 (1)
The Lea Park Formation of the Western
Canada Sedimentary Basin (WCSB) is a westward-thinning, regionally extensive
succession of marine sediments deposited in the Western Interior Seaway during transgressive and regressive phases of the Campanian Claggett Cycle. The
WCSB is a retroarc foreland system produced by thrust
sheet loading in the Canadian Cordillera and resultant flexural displacement of
the lithosphere east of the orogenic front. Relative
sea level fluctuations produced by flexural subsidence and uplift are the
primary control on the creation or destruction of accommodation space in
foreland settings, and thus control the thicknesses of depositional sequences
to a large extent. Ranges of thickness values from various locations across the
WCSB were compiled for a chronostratigraphic interval
encompassing the
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California