Late Holocene flood history of the Tanana River, Alaska, U. S. A
Journal Article
·
· Arctic and Alpine Research (Boulder, Colorado); (United States)
- Univ. of Alaska, Fairbanks (United States)
The Tanana River basin in central Alaska drains both the north slope of the Alaska Range and the south slope of the Yukon-Tanana upland. A sequence of historic and prehistoric flood deposits of the Tanana River is preserved in a small bedrock-sheltered slough near Fairbanks. Examination of these deposits using a suite of radiometric dates, microstratigraphic observations, and granulometric statistics suggests that large changes in flood frequency occurred during the late Holocene. Three major lithostratigraphic units are observed: (1) thick cross-bedded, pedogenically unaltered alluvial silty sands which were deposited between 3,000 and 2,000 yr BP, recording an interval of large floods; (2) a series of thin silty beds and paleosols formed after 2,000 yr BP during an interval when large floods were uncommon; and (3) a sequence of sand units recording large floods during the last several hundred years. Flood frequencies appear to have changed in response to regional climate changes, with more frequent flooding occurring during times of widespread alpine glaciation and increased storminess.
- OSTI ID:
- 5370029
- Journal Information:
- Arctic and Alpine Research (Boulder, Colorado); (United States), Journal Name: Arctic and Alpine Research (Boulder, Colorado); (United States) Vol. 23:4; ISSN 0004-0851; ISSN ATLPA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pedogenesis and paleoclimatic implications of the Chamberlain Pass Formation, basal White River Group, Badlands of South Dakota
Evidence of Late-Holocene floods in the central Great Plains
Protolith relations of the Gravina belt and Yukon-Tanana terrane in central southeastern Alaska
Conference
·
Tue Dec 31 23:00:00 EST 1991
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5589708
Evidence of Late-Holocene floods in the central Great Plains
Conference
·
Tue Dec 31 23:00:00 EST 1991
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5689121
Protolith relations of the Gravina belt and Yukon-Tanana terrane in central southeastern Alaska
Journal Article
·
Tue Dec 31 23:00:00 EST 1991
· Journal of Geology; (United States)
·
OSTI ID:7003962
Related Subjects
58 GEOSCIENCES
580000* -- Geosciences
AGE ESTIMATION
ALASKA
ALLUVIAL DEPOSITS
CENOZOIC ERA
CLIMATE MODELS
DEPOSITION
DEVELOPED COUNTRIES
DISASTERS
ENVIRONMENTAL TRANSPORT
FLOODS
FREQUENCY ANALYSIS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGY
GLACIERS
HYDROLOGY
ISOTOPE DATING
MASS TRANSFER
MATHEMATICAL MODELS
NORTH AMERICA
PALEOCLIMATOLOGY
PALEONTOLOGY
QUATERNARY PERIOD
RIVERS
RUNOFF
SITE CHARACTERIZATION
STRATIGRAPHY
STREAMS
SURFACE WATERS
USA
WATERSHEDS
580000* -- Geosciences
AGE ESTIMATION
ALASKA
ALLUVIAL DEPOSITS
CENOZOIC ERA
CLIMATE MODELS
DEPOSITION
DEVELOPED COUNTRIES
DISASTERS
ENVIRONMENTAL TRANSPORT
FLOODS
FREQUENCY ANALYSIS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGY
GLACIERS
HYDROLOGY
ISOTOPE DATING
MASS TRANSFER
MATHEMATICAL MODELS
NORTH AMERICA
PALEOCLIMATOLOGY
PALEONTOLOGY
QUATERNARY PERIOD
RIVERS
RUNOFF
SITE CHARACTERIZATION
STRATIGRAPHY
STREAMS
SURFACE WATERS
USA
WATERSHEDS