A 3 m. y. record of Pliocene-Pleistocene loess in interior Alaska

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1990)018<0858:AMYROP>2.3.CO;2· OSTI ID:6140166

Westgate, J A; Stemper, B A ^[1]; Pewe, T L ^[2]

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1. Univ. of Toronto, Ontario (Canada)
2. Arizona State Univ., Tempe (USA)

Many distal tephra beds exist in the thick, fossiliferous loess deposits near Fairbanks interior Alaska. Isothermal plateau fission-track ages, determined on glass shards from tephra beds, in conjunction with tephrostratigraphic and magnetostratigraphic techniques, indicate that loess deposition began in the late Pliocene-an antiquity previously unsuspected. Hence, there is the opportunity now to reconstruct a detailed, well-dated record of environmental changes in interior Alaska during the past 3 m.y.

• OSTI ID: 6140166
• Journal Information: Geology; (USA), Vol. 18:9; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
ALASKA
GEOLOGIC DEPOSITS
AGE ESTIMATION
LOAM
CLIMATES
DEPOSITION
FISSION TRACKS
MAGNETIC SURVEYS
PALEOCLIMATOLOGY
PLEISTOCENE EPOCH
PLIOCENE EPOCH
STRATIGRAPHY
THICKNESS
VARIATIONS
CENOZOIC ERA
DIMENSIONS
FEDERAL REGION X
GEOLOGIC AGES
GEOLOGY
GEOPHYSICAL SURVEYS
NORTH AMERICA
PALEONTOLOGY
PARTICLE TRACKS
QUATERNARY PERIOD
SOILS
SURVEYS
TERTIARY PERIOD
USA
580000* - Geosciences