The Birch River: a nonconformable fluvial depositional system in a lacustrine transgressive regime ...

• Main Author: Molnar, Theresa M.
• Format: Master Thesis
• Language: English
• Published: University of Calgary 1994
• Subjects: GB 598.15 M65 1994; Deltas - Alberta - Birch River Valley; Alluvial fans - Alberta - Birch River Valley; Birch River Valley Alta.; Sedimentation and deposition - Alberta - Birch River Valley; Lake Claire
• Online Access: https://dx.doi.org/10.11575/prism/15871; https://prism.ucalgary.ca/handle/1880/30252

Bibliography: p. 97-100. ... : The lower Birch River alluvial valley displays morphologic features of a once active laterally accreting meandering river system which includes scroll bar plains and oxbow lakes however, the most recent of these features do not conform to previously documented lateral accretionary deposits and flu vial style. The older scroll bar plains display typical ridge and swale topography, whereas the distal sequences (away from the river) are partially or wholly emersed in water producing small, shallow lakes, which suggests valley aggradation of the alluvial fill. The morphology and stratigraphy of the Birch River alluvial valley and delta is hypothesized to have been and is presently influenced by a lake transgression (Lake Claire) induced by differential postglacial isostatic rebound. This has caused valley and deltaic aggradation and land loss due to rising lake level. Eighty kilometres northeast of the delta, the Riviere des Rochers, the regional hydrologic outlet, is rebounding at a faster rate than the Lake ...