2026-09-22T09:39:58Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/86543 2023-07-11 col_2142_5131 col_2142_16322 com_2142_5130 com_2142_16321 com_2142_13459 com_2142_8903

S. Marshak Paulsen, Timothy Scott 2015-09-28T15:12:33Z 2015-09-28T15:12:33Z 10000-01-01 1997 1997 Regional synthesis of stratigraphic data and study of thrust-belt analog models suggests that the map-view geometry of the Sevier fold-thrust belt was influenced during formation, at the site of the future U/C arch because the site marked an abrupt change in the thickness of the sedimentary basin in which the fold-thrust belt formed. Basin geometry, in turn, was affected by reactivation of a long-lived basement fault system. Abrupt thickening of sedimentary strata to the south of this fault zone led to the development of the CTZ, for thrust systems propagate further to the foreland where strata are thicker. Thinning of strata adjacent to the north flank of the basement fault zone similarly retarded foreland propagation of the thrust belt, but because the thinning was not so abrupt as on the south side, an ESE-verging low-angle thrust and fold system developed, rather than a tear. In sum, the Uinta recess reflects both variation in sedimentary basin thickness prior to the origin of the Sevier fold-thrust belt, and the affects of later (Laramide) uplift and Tertiary extension. Made available in DSpace on 2015-09-28T15:12:33Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9717325.pdf: 6289688 bytes, checksum: a3ed0f7a6f8f4d9b523c9dfb0de729ef (MD5) Previous issue date: 1997 Embargo set by: Seth Robbins for item 87824 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 127 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1997. http://hdl.handle.net/2142/86543 (MiAaPQ)AAI9717325 eng Physical Geography Tectonics of the Uinta Recess in the Sevier Fold-Thrust Belt, Utah text Geology Geology University of Illinois at Urbana-Champaign Dissertation Ph.D.