Geological Society of America

24 Early Career Voices of Appalachian Tectonics

Saturday, 18 March 2023
8:00 AM - 12:00 PM
Regency Ballroom B

“APPA-LAY-CHA” VS. “APPA-LATCH-A”: POTENTIAL ORIGINS OF FUNDAMENTAL DIFFERENCES BETWEEN THE NORTHERN AND SOUTHERN SECTORS OF THE APPALACHIAN OROGEN

Paper number: 24-2
Program: Theme Sessions
Time: 8:05 AM – 8:25 AM

Authors

Naomi Becker Presenting Author
Johns Hopkins University, Baltimore, MD
George Guice
Johns Hopkins University, Baltimore, MD
George Guice
American Museum of Natural History, New York, NY
Freya George
Johns Hopkins University, Baltimore, MD
Freya George
University of Bristol, Bristol
Daniel Viete
Johns Hopkins University, Baltimore, MD

Abstract

It has long been recognized that the character of the northern and southern Appalachians differs significantly. Ophiolites along the Appalachian Orogen may provide insight into how fundamental differences in the subduction setting may be responsible for some of these contrasts. We present metamorphic, spatial, and geochronological data on two ophiolites from the southern Appalachians (Dadeville, USA; Baltimore, USA) and three ophiolites from the northern Appalachians and Caledonides (Thetford Mines, Canada; Unst, UK; Leka, Norway). We highlight similarities and differences between the ophiolite complexes and discuss how the geometry of earliest subduction may have controlled system architecture, what is preserved and the mechanisms responsible.

Geological Society of America Abstracts with Programs. Vol. 55, No. 2

doi: 10.1130/abs/2023SE-385684

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