| Title | The glacilacustrine sedimentary environment of Bowser Lake in the northern Coast Mountains of British Columbia, Canada |
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| Author | Gilbert, R; Desloges, J R; Clague, J J |
| Source | Palaeoclimatology and palaeoceanography from Late Quaternary and Holocene laminated sediments: a global joint approach using marine and lacustrine sediments; by Gilbert, R (ed.); Lemmen, D (ed.); Journal
of Paleolimnology vol. 17, no. 3, 1997 p. 331-346, https://doi.org/10.1023/A:1007900411724 |
| Links | Abstract - Résumé
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| Year | 1997 |
| Alt Series | Geological Survey of Canada, Contribution Series 44495 |
| Publisher | Springer Nature |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf (Adobe Acrobat Reader) |
| Program | IGCP Project 374 - Paleoclimatology and Palaeoceanography from Laminated Sediments |
| Program | NSERC Natural Sciences and Engineering Research Council of
Canada |
| Released | 1997 01 01 |
| Abstract | Bowser Lake, a fiord lake in the northern Coast Mountains of British Columbia, contains a thick Holocene fill consisting mainly of silt and clay varves. These sediments were carried into the lake by
proglacial Bowser River which drains a high-energy, heavily glacierized basin. Sedimentation in the lake is controlled by seasonal snow and ice melt, by autumn rainstorms, and by rare, but very large jökulhlaups from glacier-dammed lakes in the upper
Bowser River basin which complicate environmental inferences from the sedimentary record. Sediment is dispersed through the deep western part of the lake by energetic turbidity currents. The turbidity currents apparently do not overtop a sill that
separates the western basin from much shallower areas to the east. Large amounts of silt and clay are deposited from suspension in the eastern part of the lake, but sediment accumulation rates there are much lower than to the west. Several strong
acoustic reflectors punctuate the varved fill in the western basin; these may be thick or relatively coarse beds deposited during jökulhlaups or exceptionally large storms. The contemporary sediment yield to Bowser Lake, estimated from sediments in
the lake, is about 360 t km-2a-1. This is a relatively high value, but it is less than yields insome other, similar montane basins with extensive snow and ice cover.The most likely explanation for the difference is that large amounts of sediment have
been, and continue to be, stored on the Bowser delta andin small proglacial lakes. |
| GEOSCAN ID | 206940 |
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