Abstract
Research Article| April 01, 1943 Geologic interpretation of gravity anomalies in the southern New England-Hudson Valley region CHESTER R. LONGWELL CHESTER R. LONGWELL Search for other works by this author on: GSW Google Scholar Author and Article Information CHESTER R. LONGWELL Publisher: Geological Society of America Received: 27 Mar 1942 First Online: 02 Mar 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 1943 Geological Society of America GSA Bulletin (1943) 54 (4): 555–590. https://doi.org/10.1130/GSAB-54-555 Article history Received: 27 Mar 1942 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation CHESTER R. LONGWELL; Geologic interpretation of gravity anomalies in the southern New England-Hudson Valley region. GSA Bulletin 1943;; 54 (4): 555–590. doi: https://doi.org/10.1130/GSAB-54-555 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 Pendulum stations occupied by the U. S. Coast and Geodetic Survey at locations chosen for their geologic significance provide a net in southern New England, eastern New York, and northern New Jersey comprising about 120 stations. Numerous supplemental stations have been added with a modem gravimeter. Specific gravities of representative rocks near the pendulum stations have been determined.Isanomaly maps based on isostatic, Bouguer, and free-air anomalies are remarkably alike in their major features. Some groups of anomalies reflect bedrock units that have exceptional densities. When corrections are applied for these local masses, regional tendencies are clarified. Two belts of negative anomalies are separated by a belt of positive anomalies. The negative belts correspond in a general way to axes of subsidence during Paleozoic periods. The entire region experienced orogenic deformation, followed by peneplanation.Since the groups of Bouguer anomalies are little affected by the ordinary isostatic corrections, and are related only in minor degree to the visible bedrock, it appears that they either indicate considerable departures from isostatic balance or reflect differences in density that are concealed. Glennie's hypothesis of crustal warping, in a modified form, offers an attractive explanation of the outstanding anomalies. 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.
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