Synchroneity of folding and crosscutting cleavage in the Newfoundland Appalachians?

• Published in: Journal of Structural Geology
• Main Author: van der Pluijm, Ben A.
• Other Authors: Department of Geological Sciences, University of Michigan, 1006 C.C. Little Building, Ann Arbor, MI 48109, U.S.A.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 1990
• Subjects: Geology and Earth Sciences; Science; Change Islands; Newfoundland
• Online Access: https://hdl.handle.net/2027.42/28935; http://www.sciencedirect.com/science/article/B6V9D-4876D6M-1W/2/f47ca722c8a7da55ecbe7ca09d493d63; https://doi.org/10.1016/0191-8141(90)90103-6

Cleavage that cuts obliquely across folds is relatively common in the Appalachians/Caledonides and this has been interpreted as evidence for regional transpression, an interpretation which is only valid if contemporaneity of folding and cleavage formation can be demonstrated. Crosscutting cleavages in folds of the Early Silurian and older Exploits Group of the northeastern Newfoundland Appalachians are axial planar to rare, mesoscopic F2 fold in the unconformably overlying Botwood Group on Change Islands. As an alternative to transected folds, it is argued that crosscutting cleavage relationships in the Exploits units are composite D1-D2 structures that represent fold superimposition. Peer Reviewed http://deepblue.lib.umich.edu/bitstream/2027.42/28935/1/0000772.pdf