In the eastern portion of the Western Gneiss region of the central Norwegian Caledonides a sequence of cover and structurally higher units have been intricately infolded with basement gneisses. The regional interference patterns have previously been explained as the combined result of gneiss dome and basin formation, recumbent folding and late cross-folding. Recent mapping however shows that the patterns can be reinterpreted as a refolded sequence of three highly noncylindrical recumbent nappes with a sheath-like form. This project will test the possibility that very large sheath folds, on the order of 30 kilometers in wavelength, occur in this orogen. Results are applicable to other deep-seated orogens where large crystalline thrust sheets have moved long distances.

Agency
National Science Foundation (NSF)
Institute
Division of Earth Sciences (EAR)
Type
Standard Grant (Standard)
Application #
9003935
Program Officer
Thomas O. Wright
Project Start
Project End
Budget Start
1990-06-01
Budget End
1992-05-31
Support Year
Fiscal Year
1990
Total Cost
$28,018
Indirect Cost
Name
Suny College at New Paltz
Department
Type
DUNS #
City
New Paltz
State
NY
Country
United States
Zip Code
12561