. Bulletins of American paleontology. 126 Bulletin 369 w Rocky Mountains Western Alberta Subsurface Central Alberta Pre-L Giv. / -Thornton Creek Member Cambrian Wabamun Fm. Graminia Elk Point Grp. / Yatlatinda Fm. ,,, „ . ' ^ .., . «.!. ^ . .. WattMtn. Fm. West A beila Arch Texl-tigure 2.—Upper Devonian strallgraphic nomenclature tor the Rocky Mountains, western Alberta and the central Alberta sub- surface (after Switzer ei 1994). The Thornton Creek Member of the Flume Formation in the Alberta Rocky Mountains is equivalent to the basal Waterways Formation in the central Alberta subsu
. Bulletins of American paleontology. 126 Bulletin 369 w Rocky Mountains Western Alberta Subsurface Central Alberta Pre-L Giv. / -Thornton Creek Member Cambrian Wabamun Fm. Graminia Elk Point Grp. / Yatlatinda Fm. ,,, „ . ' ^ .., . «.!. ^ . .. WattMtn. Fm. West A beila Arch Texl-tigure 2.—Upper Devonian strallgraphic nomenclature tor the Rocky Mountains, western Alberta and the central Alberta sub- surface (after Switzer ei 1994). The Thornton Creek Member of the Flume Formation in the Alberta Rocky Mountains is equivalent to the basal Waterways Formation in the central Alberta subsurface ( = Lower T-R cycle A of Wendte ft al., 1995. and L'yeno and Wendte, this volume). to fine-sandstone of indeteiminate age that overlays finely laminated Upper Cambrian dolomitic mudstones of the Formation (Te.\t-tigs. 4 and 5; Aitken. 1966). The contact between the Devonian and older Paleozoic rocks, locally a disconformity, is regionally an angular unconformity with progressively younger Paleozoic rocks underlying Devonian rocks to the east and west of the West Alberta Arch (McLaren. 1953; Pugh. 1973). Facies Three major lithofacies comprise the Thornton Creek Member at its type section (Text-ttgs. 3, 4 and 5). These are: 1) laminated to buiTowed argillaceous dolo-mudstone and calcareous shale. 2) fossiliferous, bioturbated. quartzose (silty to sandy) dolo-mud/wack/ packstones, and 3) dolomitic sandstones (Text-figs. 4 and 5). The laminated to burrowed argillaceous dolo- mudstone and calcareous shale are dark gray to dark brown, laminated to thin bedded, dominantly unfossil- SE Thornton Creek -<^.0 km^ SE Mt. Haultain 1 0 6 km [ Haultain Cirque H— 0 35 km G -+0 20 km-f 020km-|— 0 25 kmH Q O 0/F F/P Type Section Thornton Cr Mbf Basal to m. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work
Size: 2429px × 1029px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorpaleonto, bookcentury1800, bookdecade1890, bookyear1895
