The marine record of the Russell Fiord outburst flood, Alaska, U.S.A
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Abstract
The advance of Hubbard Glacier, near Yakutat, Alaska, U.S.A., in spring 1986 blocked the entrance to Russell Fiord with an ice-and-sediment dam, behind which a lake formed. The water level in Russell Lake rose to 25.5 m a.s.l. The dam catastrophically failed in October 1986, releasing 5.4 km3 of water into Disenchantment Bay. High-resolution seismic-reflection profiles show a 7.5 km long channel system cut into and buried by glacimarine sediment, represented by continuous, parallel reflections. The chaotic seismic facies filling the channel is interpreted to be debris flow deposits. A gravity core from channel-overbank deposits contained sandy diamicton with mud clasts. Above the channel a 1-2 m thick sediment drape extends across the bay. Laminated mud, fining-upward sand beds and diamicton were recovered from this unit. The sediment-drape deposits were produced by suspension settling from turbid plumes and non-channelized turbidity currents generated by the outburst flood.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The marine record of the Russell Fiord outburst flood, Alaska, U.S.A |
| Series title | Annals of Glaciology |
| DOI | 10.3189/1996AoG22-1-194-199 |
| Volume | 22 |
| Year Published | 1996 |
| Language | English |
| Publisher | Cambridge University Press |
| Description | 6 p. |
| First page | 194 |
| Last page | 199 |
| Country | United States |
| State | Alaska |
| Other Geospatial | Disenchantment Bay, Hubbard Glacier, Russell Fjord, Russell Lake |
| Google Analytic Metrics | Metrics page |