Paleoclimatic forcing of magnetic susceptibility variations in Alaskan loess during the late Quaternary

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1990)018<0040:PFOMSV>2.3.CO;2· OSTI ID:6213286

Beget, J E; Stone, D B; Hawkins, D B ^[1]

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1. Univ. of Alaska, Fairbanks (USA)

Visual matches and statistical tests suggest correlations between marine isotope curves, retrodictive solar insolation at lat 65{degree}N, and magnetic susceptibility profiles through late Quaternary age Alaskan loess sections. The susceptibility changes largely appear to reflect variability in magnetite content due to climatically controlled changes in wind intensity and competence. Magnetic susceptibility profiles through massive loess can provide stratigraphic context for intercalated paleosols and tephras. A prominent paleosol correlated with marine isotope stage 5 occurs several metres above the Old Crow ash in loess sections, indicating that this important tephra is older than suggested by thermoluminescence dates, and may have been deposited ca. 215 {plus minus}25 ka.

• OSTI ID: 6213286
• Journal Information: Geology; (USA), Journal Name: Geology; (USA) Vol. 18:1; ISSN GLGYB; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
ALASKA
CENOZOIC ERA
CHALCOGENIDES
CLIMATES
CORRELATIONS
CRYSTAL STRUCTURE
FEDERAL REGION X
GEOLOGIC AGES
GEOLOGIC MODELS
GEOPHYSICAL SURVEYS
GRAIN SIZE
IRON COMPOUNDS
IRON ORES
IRON OXIDES
LOAM
MAGNETIC PROPERTIES
MAGNETIC SURVEYS
MAGNETIC SUSCEPTIBILITY
MAGNETITE
MICROSTRUCTURE
MINERALS
NORTH AMERICA
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PALEOCLIMATOLOGY
PALEONTOLOGY
PHYSICAL PROPERTIES
QUANTITY RATIO
QUATERNARY PERIOD
SIZE
SOILS
SURVEYS
TRANSITION ELEMENT COMPOUNDS
USA
VARIATIONS