Abstract:
This data base contains information on cosmogenic helium-3 and beryllium-10 surface exposure dates on Ross Sea Drift moraine boulders from Hjorth Hill, McMurdo Sound, Antarctica (77 degrees 31' South, 163 degrees 37' East). This study was designed to combine surficial ages with a Ground Penetrating Radar data set generated by Dr. M. Prentice at the University of New Hampshire.
Surface exposure dating relies on the build-up of cosmogenic nuclides in materials exposured to cosmic radiation. Because cosmogenic rays only penetrate 2 m in rock, freshly eroded glacial debris only begins accumulating cosmogenic nuclides after deposition from the glacier. When production rates are known the concentration of cosmogenic nuclides in moraine boulders can be used to date formation of end moraines and drift sheets.
The samples were collected by M.D. Kurz and R. Ackert and colleagues during the 1990 and 1992 field seasons. The samples are archived at Woods Hole Oceanographic Institution. The ages, provided below in the table, provide age constraints on this important record of past fluctuations of the West Antarctic Ice Sheet.
Name:
MARK
D.
KURZ Phone:
508-289-2888
Fax:
508-457-2193
Email:
mkurz at whoi.edu
Contact Address:
Woods Hole Oceanographic Institution City:
Woods Hole
Province or State:
MA
Postal Code:
02543
Country:
USA
Personnel
ROBERT
P.
ACKERT, JR. Role:
DIF AUTHOR
Phone:
508-289-3515
Contact Address:
Clark 419, MS 25
Woods Hole Oceanographic Institution City:
Woods Hole
Province or State:
MA
Postal Code:
02543
Country:
USA
Creation and Review Dates
DIF Creation Date:
2003-10-08
Last DIF Revision Date:
2010-07-21
