Station: 05BL-7

Station ID: 05BL-7 [1]
Volcano: Redoubt
Collector: Schiff, Caleb
Date visited:
NAD83 latitude: 60.41
NAD83 longitude: -152.35998
Default location: No
Location description: Bear Lake, located in the upper Cook Inlet lowlands of south-central Alaska. Core 3 taken from southern area of eastern basin. The summit of Redoubt Volcano is 22 km west. Cub Lake is 17 km away. The lake is lcoated at 90 m above sea level and has two sub-basins: a deeper western sub-basin with a maximum depth of 17 m and a shallower eastern basin. Lake surface area is 0.5 square km and the drainage basin area is 1.5 square km, with a maximum elevation of 200 m and minor relief. Bear Lake has no inflow streams and is likely fed primarily by groundwater; however, there is one outflow to the north. Sediment cores recovered from Bear-Lake are primarily massive gyttja, and 69 tephra layers greater than or equal to 1 mm thick (38 were deposited between 11540 and 3850 years BP and the other 41 were deposited since then). Ten major tephras and six minor tephras were correlated between BL-3 and CB-2 (from Cub Lake), primarily on the basis of their estimated age, stratigraphic sequence, and color; these tephras were used to form the basic tephrostratigraphic framework and as a basis for correlations of other minor tephras betwen the two lakes. Location coordinates imprecisely georeferenced from figure 2c.
Station Location:
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References Cited

[1] An improved proximal tephrochronology for Redoubt Volcano, Alaska, 2010

Schiff, C.J., Kaufman, D.S., Wallace, K.L., and Ketterer, M.E., 2010, An improved proximal tephrochronology of Redoubt Volcano, Alaska: Journal of Volcanology and Geothermal Research, v. 193, no. 3/4, p. 203-214, doi: 10.1016/j.jvolgeores.2010.03.015 .