4 Marine and Terrestrial Coastal Mapping: Data, Discovery, and Science

Monday, 21 March 2016
8:00 AM - 12:00 PM
Meeting Room 2

SEISMIC REFLECTIONS FROM OFFSHORE OF PROVINCETOWN, CAPE COD, MASSACHUSETTS

Paper number: 4-5
Program: Theme Sessions
Time: 9:05 AM – 9:25 AM

Authors

Abstract

In the Spring of 2012, marine seismic data were acquired near Provincetown, MA to extend geology mapped onshore into the offshore subsurface. This seismic data was analyzed predominantly for the shallow (< ~50 ms) section. We plotted the seismic data to 250 ms to see if any deeper reflected energy was present. In many of the seismic profiles, strong reflections are present at two-way times between about 70 ms to greater than 150 ms. Interestingly, these reflectors are not present in all the seismic transects. The lack of reflections may indicate that the energy did not penetrate to these times, that multiples from overlying sediments mask these weaker reflections, or that the reflecting interface is discontinuous beneath the region. The deeper reflectors are observed beneath the near shore marine environment as well as extending further offshore beneath deeper water. Multiples often overprint or mask these reflections from beneath the deeper water. We interpret these deeper arrivals as returning from the contact with Cretaceous rocks or perhaps from within the thick package of Pleistocene glacial sediments.

Geological Society of America Abstracts with Programs. Vol. 48, No. 1

doi: 10.1130/abs/2016NE-272429

© Copyright 2016 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.