Foraminiferal response to Albian relative sea-level changes in northwestern and central Alberta, Canada
Albian foraminiferal assemblages from three wells in northwestern (Imperial Spirit River No. 1, 12-20-78-6W6), central (AngloHome C and E Fort Augustus No. 1, 7-29-55-21W4), and southern Alberta (Amoco B1 Youngstown, 6-34-30-8W4) provide the basis to track a fluctuating sea-level history in western...
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ftcarletonunivir:oai:carleton.ca:2058 2023-05-15T18:26:56+02:00 Foraminiferal response to Albian relative sea-level changes in northwestern and central Alberta, Canada Stritch, R.A. (Rebecca A.) Schroder-Adams, C. (Claudia) 1999-01-01 https://ir.library.carleton.ca/pub/2058 https://doi.org/10.1139/e99-079 en eng https://ir.library.carleton.ca/pub/2058 doi:10.1139/e99-079 Canadian Journal of Earth Sciences vol. 36 no. 10, pp. 1617-1643 info:eu-repo/semantics/article 1999 ftcarletonunivir https://doi.org/10.1139/e99-079 2022-02-06T21:51:28Z Albian foraminiferal assemblages from three wells in northwestern (Imperial Spirit River No. 1, 12-20-78-6W6), central (AngloHome C and E Fort Augustus No. 1, 7-29-55-21W4), and southern Alberta (Amoco B1 Youngstown, 6-34-30-8W4) provide the basis to track a fluctuating sea-level history in western Canada. Two global second-order marine cycles (Kiowa-Skull Creek and Greenhorn) were punctuated by higher frequency relative sea-level cycles expressed during the time of the Moosebar-Clearwater, Hulcross, Joli Fou, and Mowry seas. A total of 34 genera and 93 subgeneric taxa are recognized in these Albian-age strata. Foraminiferal abundance and species diversity of the latest Albian Mowry Sea were higher than in the early to middle Albian Moosebar-Clearwater and Hulcross seas. The two earliest paleo-seas were shallow embayments of the Boreal Sea, and relative sea-level fluctuations caused variable marine to brackish conditions expressed in a variety of faunal assemblages. Towards the late Albian, relative sea level rose, deepening the basin and establishing increased marine conditions and more favourable habitats for foraminifera. In the deeper Joli Fou Seaway and Mowry Sea, however, reduced bottom water oxygen through stratification or stagnant circulation caused times of diminished benthic faunas. The Bluesky Formation in northwestern Alberta contains the initial transgression of the early Albian Moosebar-Clearwater Sea and is marked by a sudden faunal increase. In contrast, transgression by the late Albian Mowry Sea was associated with a gradual increase of foraminiferal faunas. Numerous agglutinated species range throughout the entire Albian, absent only at times of basin shallowing. However, each major marine incursion throughout the Albian introduced new taxa. Article in Journal/Newspaper Spirit River Carleton University's Institutional Repository Canada Joli ENVELOPE(140.015,140.015,-66.663,-66.663) Spirit River ENVELOPE(-118.837,-118.837,55.780,55.780) Bluesky ENVELOPE(-118.236,-118.236,56.067,56.067) Skull Creek ENVELOPE(-119.453,-119.453,61.200,61.200) Hulcross ENVELOPE(-122.120,-122.120,55.633,55.633) Canadian Journal of Earth Sciences 36 10 1617 1643 |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
description |
Albian foraminiferal assemblages from three wells in northwestern (Imperial Spirit River No. 1, 12-20-78-6W6), central (AngloHome C and E Fort Augustus No. 1, 7-29-55-21W4), and southern Alberta (Amoco B1 Youngstown, 6-34-30-8W4) provide the basis to track a fluctuating sea-level history in western Canada. Two global second-order marine cycles (Kiowa-Skull Creek and Greenhorn) were punctuated by higher frequency relative sea-level cycles expressed during the time of the Moosebar-Clearwater, Hulcross, Joli Fou, and Mowry seas. A total of 34 genera and 93 subgeneric taxa are recognized in these Albian-age strata. Foraminiferal abundance and species diversity of the latest Albian Mowry Sea were higher than in the early to middle Albian Moosebar-Clearwater and Hulcross seas. The two earliest paleo-seas were shallow embayments of the Boreal Sea, and relative sea-level fluctuations caused variable marine to brackish conditions expressed in a variety of faunal assemblages. Towards the late Albian, relative sea level rose, deepening the basin and establishing increased marine conditions and more favourable habitats for foraminifera. In the deeper Joli Fou Seaway and Mowry Sea, however, reduced bottom water oxygen through stratification or stagnant circulation caused times of diminished benthic faunas. The Bluesky Formation in northwestern Alberta contains the initial transgression of the early Albian Moosebar-Clearwater Sea and is marked by a sudden faunal increase. In contrast, transgression by the late Albian Mowry Sea was associated with a gradual increase of foraminiferal faunas. Numerous agglutinated species range throughout the entire Albian, absent only at times of basin shallowing. However, each major marine incursion throughout the Albian introduced new taxa. |
format |
Article in Journal/Newspaper |
author |
Stritch, R.A. (Rebecca A.) Schroder-Adams, C. (Claudia) |
spellingShingle |
Stritch, R.A. (Rebecca A.) Schroder-Adams, C. (Claudia) Foraminiferal response to Albian relative sea-level changes in northwestern and central Alberta, Canada |
author_facet |
Stritch, R.A. (Rebecca A.) Schroder-Adams, C. (Claudia) |
author_sort |
Stritch, R.A. (Rebecca A.) |
title |
Foraminiferal response to Albian relative sea-level changes in northwestern and central Alberta, Canada |
title_short |
Foraminiferal response to Albian relative sea-level changes in northwestern and central Alberta, Canada |
title_full |
Foraminiferal response to Albian relative sea-level changes in northwestern and central Alberta, Canada |
title_fullStr |
Foraminiferal response to Albian relative sea-level changes in northwestern and central Alberta, Canada |
title_full_unstemmed |
Foraminiferal response to Albian relative sea-level changes in northwestern and central Alberta, Canada |
title_sort |
foraminiferal response to albian relative sea-level changes in northwestern and central alberta, canada |
publishDate |
1999 |
url |
https://ir.library.carleton.ca/pub/2058 https://doi.org/10.1139/e99-079 |
long_lat |
ENVELOPE(140.015,140.015,-66.663,-66.663) ENVELOPE(-118.837,-118.837,55.780,55.780) ENVELOPE(-118.236,-118.236,56.067,56.067) ENVELOPE(-119.453,-119.453,61.200,61.200) ENVELOPE(-122.120,-122.120,55.633,55.633) |
geographic |
Canada Joli Spirit River Bluesky Skull Creek Hulcross |
geographic_facet |
Canada Joli Spirit River Bluesky Skull Creek Hulcross |
genre |
Spirit River |
genre_facet |
Spirit River |
op_source |
Canadian Journal of Earth Sciences vol. 36 no. 10, pp. 1617-1643 |
op_relation |
https://ir.library.carleton.ca/pub/2058 doi:10.1139/e99-079 |
op_doi |
https://doi.org/10.1139/e99-079 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
36 |
container_issue |
10 |
container_start_page |
1617 |
op_container_end_page |
1643 |
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1766208897266221056 |