| Title | Paleogeography, glacially induced crustal displacement, and Late Quaternary coastlines on the continental shelf of British Columbia, Canada
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| Author | Hetherington, R; Barrie, J V; Reid, R G B; MacLeod, R; Smith, D J |
| Source | Quaternary Science Reviews vol. 23, 2004 p. 295-318, https://doi.org/10.1016/j.quascirev.2003.04.001 |
| Links | Abstract - Résumé
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| Year | 2004 |
| Alt Series | Geological Survey of Canada, Contribution Series 200372 |
| Publisher | Elsevier BV |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | British Columbia; Western offshore region |
| NTS | 102H/09; 102H/10; 102H/11; 102H/12; 102H/13; 102H/14; 102H/15; 102H/16; 102I; 102O; 102P; 103A; 103B; 103C; 103F; 103G; 103H; 103I; 103J; 103K |
| Area | Queen Charlotte Islands; Graham Island; Moresby Island; Rose Spit; Sandspit; Masset; Tlell; Port Simpson; Prince Rupert; Dixon Entrance; Dogfish Bank; Hecate Strait; Goose Island Bank; Goose Island Trough;
Queen Charlotte Sound; Cook Bank; Terrace; Kitimat; Pacific Ocean; Haida Gwaii |
| Lat/Long WENS | -133.5000 -128.0000 55.0000 50.5000 |
| Subjects | surficial geology/geomorphology; tectonics; regional geology; mathematical and computational geology; sea level changes; glacial history; deglaciation; isostatic compensation; crustal movements;
paleogeography; continental shelf; radiocarbon dates; geostatistics; paleoenvironment; faults; models; mantle; lithosphere; viscosity; Mollusca; Bivalvia; Gastropoda; Cirripedia; Last Glacial Maximum; forebulge; crustal flexure; elasticity;
Quaternary |
| Illustrations | location maps; digital elevation models; block diagrams; tables; plots; graphs; models |
| Program | NSERC Natural Sciences and Engineering Research Council of
Canada |
| Program | IGCP
Project 464 - Continental Shelves during the Last Glacial Cycle: Knowledge and Applications |
| Program | University of
Victoria, Ord and Linda Anderson Interdisciplinary Graduate Scholarship |
| Abstract | Subsequent to the Last Glacial Maximum (LGM), complex isostatic adjustments resulted from deglaciation, eustatic sea level change, tectonic faulting, and a relatively thin, flexible lithosphere in the
Queen Charlotte Islands (QCI) region. A geostatistical interpolation model charts the sequence of evolving landscapes and displays temporal changes in the magnitudes and extent of crustal flexure that accompanied forebulge development on the Late
Quaternary northeast Pacific continental shelf between 14.2 and 8.7 ka BP. Wavelength and forebulge amplitude are consistent with thermal modeling implying low upper mantle viscosity and thin elastic lithospheric thickness beneath Queen Charlotte
(QC) Sound and Hecate Strait. Glacial ice ~690 m thick began retreating from Dixon Entrance after 14.5 ka BP (14C years ago) and prior to 12.6 ka BP, permitting over 100 m of crustal uplift in northern Hecate Strait. A forebulge persisted in Hecate
Strait and QC Sound from 13.2 until after 9.7 ka BP, implying fixed glacial ice on the British Columbia (BC) mainland until ~10 ka BP. Paleogeographic reconstructions show two emergent ice-free terrains, one extending eastward from the QCI and the
other in QC Sound. By ~11.7 ka BP, a landbridge connected the BC mainland and the QCI. |
| GEOSCAN ID | 214493 |
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