U.S. Geological Survey deep seismic reflection profile across the Gulf of Maine

Research Article| February 01, 1988 U.S. Geological Survey deep seismic reflection profile across the Gulf of Maine D. R. HUTCHINSON; D. R. HUTCHINSON 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar K. D. KLITGORD; K. D. KLITGORD 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar M. W. LEE; M. W. LEE 2U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar A. M. TREHU A. M. TREHU 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar Author and Article Information D. R. HUTCHINSON 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 K. D. KLITGORD 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 M. W. LEE 2U.S. Geological Survey, Denver, Colorado 80225 A. M. TREHU 1U.S. Geological Survey, Woods Hole, Massachusetts 02543 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1988) 100 (2): 172–184. https://doi.org/10.1130/0016-7606(1988)100<0172:USGSDS>2.3.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation D. R. HUTCHINSON, K. D. KLITGORD, M. W. LEE, A. M. TREHU; U.S. Geological Survey deep seismic reflection profile across the Gulf of Maine. GSA Bulletin 1988;; 100 (2): 172–184. doi: https://doi.org/10.1130/0016-7606(1988)100<0172:USGSDS>2.3.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 SocietyGSA Bulletin Search Advanced Search Abstract Deep seismic reflection and magnetic data suggest that the Gulf of Maine is underlain by four crustal blocks of differing reflection and magnetic character. Two of these blocks, the Gulf of Maine fault zone and adjacent central plutonic zone, can be correlated with Avalonian rocks in southern New England and New Brunswick. The boundary between them, the Fundy fault, projects onshore near the Ponkapoag fault in southeastern Massachusetts in a region where no major crustal boundary has (yet) been identified. A third block, called the southern plutonic zone, is interpreted as Avalonian, although the reflection and magnetic data are ambiguous. The fourth block, along the rifted continental margin, is correlated with Meguma rocks of Nova Scotia. The late Paleozoic Variscan front crosses the Gulf of Maine within the Gulf of Maine fault zone and indicates significant compressional movement rather than strike-slip.The Moho surface throughout the region is essentially flat and may have been produced by Mesozoic crustal extension. Associated modification of the lower crust was minimal in the northern Gulf and may have been moderate in the central and southern Gulf. The Franklin rift basin formed by reactivation of the inferred Avalon-Meguma boundary beneath Georges Bank as a low-angle detachment. 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.