| Title | Distribution of "anomalously thick sandstone bodies" in the Middle Triassic of the Western Canada Sedimentary Basin |
| Download | Downloads |
| Author | Dixon, J |
| Source | Geological Survey of Canada, Open File 5120, 2006, 12 pages; 1 CD-ROM, https://doi.org/10.4095/221965 (Open Access) |
| Links | Metadata - Métadonnées
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| Year | 2006 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | CD-ROM; digital; on-line |
| Related | This publication is related to Dixon, J; (2004). Evidence
for a major unconformity in Middle Triassic strata (Doig, Halfway and lowermost Charlie Lake formations) of the Grande Prairie area (Map-sheet 83 M; townships 70 to 80, ranges 1W6 to 13W6), west-central Alberta, Geological Survey of Canada, Open File
1580 |
| File format | readme
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| File format | gif; htm; jpg; pdf (Adobe Acrobat Reader); rtf |
| Province | Alberta; British Columbia |
| NTS | 83M; 93P; 94A |
| Area | Fort St. John; Dawson Creek; Grande Prairie |
| Lat/Long WENS | -122.0000 -118.0000 57.0000 55.0000 |
| Subjects | stratigraphy; sedimentology; Middle Triassic; sedimentary rocks; sandstones; faults, normal; well locations; stratigraphic correlations; slump structures; gamma ray logging; sea level changes;
transgressions; erosion; regressions; unconformities; sedimentary basins; shoreface deposits; muds; Western Canada Sedimentary Basin; Peace River Embayment; Beatton High; Halfway Formation; Doig Formation; Gwillim Thrust; Charlie Lake Formation;
Montney Formation; siliciclastics; Phanerozoic; Mesozoic; Triassic |
| Illustrations | sketch maps; stratigraphic charts; stratigraphic correlations; stratigraphic sections; block diagrams |
| Released | 2006 04 01 |
| Abstract | Isolated, thick sandstone bodies in the Middle Triassic Doig Formation have been termed "anomalously thick sandstone bodies" (ATSBs) and are present in west-central Alberta and northeast British
Columbia. They occur at several stratigraphic levels within the Doig Formation, over a limited geographic area. The ATSBs tend to become younger to the west and southwest, reflecting the direction of progradation for Middle Triassic sediments. Their
distribution closely parallels the Peace River Embayment, a basin-scale depression that originated in the Carboniferous and continued to subside during the Triassic.
The ATSBs formed in translational and rotational slumps on muddy prograding
siliciclastic sediment lenses during periods of relative sea-level fall. Lower and middle shoreface deposits filled in these slumps during base-level fall and were subsequently capped by a thin layer of transgressive sandstone when sea-level began to
rise. |
| GEOSCAN ID | 221965 |
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