Crustal structure beneath the southern Appalachians: Nonuniqueness of gravity modeling

Research Article| October 01, 1983 Crustal structure beneath the southern Appalachians: Nonuniqueness of gravity modeling Deborah R. Hutchinson; Deborah R. Hutchinson 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar John A. Grow; John A. Grow 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar Kim D. Klitgord Kim D. Klitgord 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar Author and Article Information Deborah R. Hutchinson 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 John A. Grow 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Kim D. Klitgord 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1983) 11 (10): 611–615. https://doi.org/10.1130/0091-7613(1983)11<611:CSBTSA>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Deborah R. Hutchinson, John A. Grow, Kim D. Klitgord; Crustal structure beneath the southern Appalachians: Nonuniqueness of gravity modeling. Geology 1983;; 11 (10): 611–615. doi: https://doi.org/10.1130/0091-7613(1983)11<611:CSBTSA>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Gravity models computed for a profile across the long-wavelength paired negative-positive Bouguer anomalies of the southern Appalachian Mountains show that the large negative anomaly can be explained by a crustal root zone, whereas the steep gradient and positive anomaly east of the root may be explained equally well by three different geometries: a suture zone, a mantle upwarp, or a shallow body. Seismic data support the existence of a mountain root but are inadequate to resolve differences among the three possible geometries for the positive anomaly. The presence of outcropping mafic and ultramafic rocks in the southern Appalachians and the inferred tectonic history of the Appalachian orogen are most consistent with the suture-zone model. Crust similar to continental crust probably exists beneath the Coastal Plain and inner continental shelf where the gravity anomalies return to near-zero values. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.