..., biostromal carbonates (upper Cairn) was restricted to the areas underlain by a thicker development in the basal limestone of stromatoporoidal carbonates, presumably shoals. Stromatoporoid reefs with thin interbeds of Amphipora limestone and calcarenite form the main constituents of the Cairn biostromes. Fine...

..., was chosen as a site for field study. Interpretations of depositional environment are based on detailed field and laboratory studies supplemented by the application of an established paleoecological model. The Cairn biostrome was deposited in shallowing water over a locally elevated area. The biostrome...

... level. Correlation of these stacking patterns from one reef complex to another reveals a hierarchy of fifth-order and third-order sea-level changes. The Flume platform and overlying Upper Cairn biostrome consist of meter-scale shallowing-upward parasequences. These are interpreted to have been deposited...

..., the margin of the platform was located between Toma Creek and the north side of Moun t MacKenzie (Section 11). Here the Cairn is almost entirely composed of skeletal and peloidal grainstones. Only a few thick biostromes composed of bulbous stromatoporoids occur in sec t ions 10 and 11. The p r e d o m i n...

... or lower Cairn Formation in the vicinity of Section 4. If so, these beds mark the maximum incursion of the Maligne Formation into the carbonate complex as this dark horizon disappears to the northwest. A biostromal Cairn tongue splits the Maligne Formation in Sections 5 and 6. The upper Maligne onlaps...

.... 13. Section 12, southern buildup margin, Burnt Timber embayment. Note that the upper Cairn member and the Peechee Member are dominantly biostromal and calcarenitic, respectively. The contact which separates them is gradational along the strike of the outcrop, even though the contact is partially...

... the Maligne Formation into the margin of those complexes. In both situations the Maligne crinoidal micrites can be traced a short distance into the lower part of the upper Cairn of the buildup, and this deeper-water facies must terminate or onlap against stromatoporoid biostromes. Coppold (1976, p. 166) noted...

... marges de plate-forme dominées par des biohermes à celles dominées par des biostromes. Un biseau progressant vers la mer, formé de schistes argileux de la formation Ireton, remblaya une bonne partie du relief dans le chenal de Cline, tandis que la partie supérieure de la plate-forme Leduc fut noyée...

... in Late Devonian time. The Cairn Formation is equivalent to the Leduc Formation in the subsurface of west- ern Canada. The Cairn Formation at Grassi Lakes was deposited as a series of biostromes under shallow marine conditions hore- ward of the margin of the carbonate complex. The massive units consist...

... into stromatoporoid-algal, Stachyodes , skeletal calcarenite, pelmicrite, and nonskeletal calcarenite microfacies on the basis of cluster analysis. The rocks of these microfacies were probably derived from marginal bioherms and biostromes, upper bank slope and backreef environments of the carbonate complex...

... on a bedding surface in th e Middle Cairn of Slide Creek. S .E . b, c) Stromatoporoid biostromes of dominantly hemi - spherical with a few irregular stromatoporoids ; Middle Cairn, Slide Creek, S .E . STROMAI'OPOROID PALEOECOLOGY 24 3 STROMATOPOROID PALEOECOLOGY OF THE SOUTHEAST MARGI N OP THE MIE'r'1'E COMPLE...

...-Cairn (Mount MacKenzie). The deposits are mostly pebble to boulder carbonate mudstone conglomerates and breccias with pervasive, dark, interstitial micrite. The largest of the deposits interpreted as debris flows occur southeast of Mount Haultain (Ancient Wall). Here, disoriented blocks (as large as 25...

..., it is adequately enough preserved to yield identifiable faunas. As noted by Workum and Hedinger, the upper part of the Upper Member of the Cairn Formation includes a distinctive coral- rich biofacies with biostromes and local small patch reefs up to 40 m thick (Workum and Hedinger, 1989b). In more interi...

... Copyright © 2015 The Paleontological Society. All rights reserved. 2015 The Paleontological Society. All rights reserved. Zooxanthellate (Z) and azooxanthellate (AZ) corals are about equally diverse today (Cairns 1999 , 2007 ) but differ strongly in their ecological requirements and environmental...

.... Thin black lines within platform sequences indicate parasequence boundaries. The abbreviation C/M in the lithostratigraphy column on the left stands for Cairn and Maligne Formations. Figure 5 Sequence stratigraphy, patterns of platform development, and interpreted Upper Frasnian second...

...J. P. A. Noble ABSTRACT A reef complex in the Cairn Formation of Late Devonian (Frasnian) age is exposed in the Rocky Mountain Front Ranges near Jasper, Alberta. Study of this reef indicates a complex array of sediment-faunal types from which a number of biofacies can be recognized. These are: 1...

... of both fossil content 224 D. R. KOBLUK (dominantly stromatoporoids) and lithology, and measures 248 m in thickness. Only the Cairn Formation (lower 80 units, 218 m in thickness, make up the Upper Cairn Mbr., Middle Cairn Mbr., and Flume Mbr.) was used in this study, however, as the overlying Peechee Mbr...

... controlled in part by ocean currents in later Leduc time. In the Stettler area, late Cooking Lake sedimentation produced shallow-water limestones, now dolomitized, along three main trends termed Fenn-Big Valley, Stettler-Erskine, and Gadsby shoals. The Gadsby shoal was characterized by widespread biostromal...

...). Triassic buildups in North America re poorly developed; most are small-scale biostromal accumulations that con- trast with the well developed Tethyan reefs (Stanley, 1979, 1982). Stanley (1982) and Fl/igel (1981) suggested that this difference may be the result of tectonic setting, as follows: the Tethyan...

... biostromes remarkably linked to shallow subtidal high-energy grainy facies (intraclastic to peloidal grainstones). Calcarenites are mainly composed of peloids, well-rounded intraclasts, aggregate lime grains, micritized ooids, and a few bioclasts. Bioclasts are very scarce and include...