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APPLYING CYCLE-SCALED MAGNETOSTRATIGRAPHY FOR GLOBAL CORRELATION OF SELECTED MAJOR PALEOCLIMATIC EVENTS IN THE TRIASSIC, CRETACEOUS AND QUATERNARY

thesis
posted on 03.12.2019 by Yang Zhang

Reversals of the Earth’s magnetic field are recorded by preferential orientation of iron oxide grains during their deposition in all types of sediments. When combined with cyclostratigraphy, magnetostratigraphy has proved to be one of the robust ways to build portions of the geologic timescale and to enable global correlation among various settings. For this PhD program, Yang Zhang utilized the combination of magnetic polarity scales with astronomical-cycle tuning to resolve long-debating time scaling of time intervals where major climate shifts (e.g., major excursions in Earth’s carbon cycle reflected in isotopic anomalies) took place. Other stratigraphical tools such as geochemistry data, radiometric dating, and biostratigraphy help constrain the validity and accuracy of cycle-scaled magnetic polarity scales.


Funding

Geologic TimeScale Foundation (USA)

Lower Cretaceous basin studies in the Arctic (LoCrA) consortium

Chevron Energy Technology Company

U.S. Science Support Program Office associated with the International Ocean Discovery Program (USSSP-IODP)

History

Degree Type

Doctor of Philosophy

Department

Earth, Atmospheric and Planetary Sciences

Campus location

West Lafayette

Advisor/Supervisor/Committee Chair

James G. Ogg

Advisor/Supervisor/Committee co-chair

Darryl Granger

Additional Committee Member 2

Matthew Huber

Additional Committee Member 3

Kenneth D. Ridgway

Additional Committee Member 4

Nathaniel A. Lifton

Additional Committee Member 5

Chunju Huang

Licence

Exports