<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>S.M. Dickson</dc:contributor>
  <dc:creator>J. T. Kelley</dc:creator>
  <dc:date>1999</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Through 10 years of support from the Minerals Management Service Association of American State Geologists'&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;Continental&lt;/span&gt;&lt;span&gt;&amp;nbsp;Margins Program we have mapped&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;along&lt;/span&gt;&lt;span&gt;&amp;nbsp;the&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;Maine&lt;/span&gt;&lt;span&gt;&amp;nbsp;coast, seaward to the 100 m isobath. In all, 1,773 bottom sample stations were occupied, 3,358 km of side-scan sonar and 5,011 km of seismic reflection profiles were gathered.&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;On&lt;/span&gt;&lt;span&gt;&amp;nbsp;the basis of these data, a&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;surficial&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;sediment&lt;/span&gt;&lt;span&gt;&amp;nbsp;map was created for the&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;Maine&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;inner&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;continental&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;shelf&lt;/span&gt;&lt;span&gt;&amp;nbsp;during the Year 8 project, and cores and seismic data were collected to evaluate sand thickness during Years 9 and 10. Sand covers only 8 % of the&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;Maine&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;shelf&lt;/span&gt;&lt;span&gt;, and is concentrated seaward of beaches off southern&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;Maine&lt;/span&gt;&lt;span&gt;&amp;nbsp;in water depths less than 60 m. Sand occurs in three depositional settings: (1) in shoreface&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;deposits&lt;/span&gt;&lt;span&gt;&amp;nbsp;connected dynamically to contemporary beaches; (2) in submerged deltas associated with lower sea-level positions; and (3) in submerged lowstand shoreline positions between 50 and 60 m. Seismic profiles over the shoreface off Saco Bay, Wells Embayment, and off the Kennebec River mouth each imaged a wedge-shaped acoustic unit which tapered off between 20 and 30 m. Cores determined that this was sand that was underlain by a variable but thin (commonly 1 m)&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;deposit&lt;/span&gt;&lt;span&gt;&amp;nbsp;of estuarine muddy sand and a thick&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;deposit&lt;/span&gt;&lt;span&gt;&amp;nbsp;of glacial-marine mud. Off Saco Bay, more than 55 million m3 of sand exists in the shoreface, compared with about 22 million m3&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;on&lt;/span&gt;&lt;span&gt;&amp;nbsp;the adjacent beach and dunes. Seaward of the Kennebec River, a large delta&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;deposited&lt;/span&gt;&lt;span&gt;&amp;nbsp;between 13 ka and the present time holds more than 300 million m3 of sand and gravel. The best sorted sand is&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;on&lt;/span&gt;&lt;span&gt;&amp;nbsp;the&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;surface&lt;/span&gt;&lt;span&gt;&amp;nbsp;nearshore, with increasing amounts of gravel offshore and mud beneath the&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;surficial&lt;/span&gt;&lt;span&gt;&amp;nbsp;sand sheet. Bedforms indicate that the&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;surficial&lt;/span&gt;&lt;span&gt;&amp;nbsp;sand is moved by waves to at least 55 m depth. Seaward of the Penobscot River, no significant sand or gravel was encountered. Muddy estuarine&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;sediments&lt;/span&gt;&lt;span&gt;&amp;nbsp;overlie muddy glacial-marine&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;sediment&lt;/span&gt;&lt;span&gt;&amp;nbsp;throughout the area offshore area of this river. No satisfactory explanation is offered for lack of a sandy delta seaward of&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;Maine's&lt;/span&gt;&lt;span&gt;&amp;nbsp;largest river. Lowstand-shoreline&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;deposits&lt;/span&gt;&lt;span&gt;&amp;nbsp;were cored in many places in Saco Bay and off the Kennebec River mouth. Datable materials from cores indicated that the lowstand occurred around 10.5 ka off the Kennebec. Cores did not penetrate glacial-marine&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;sediment&lt;/span&gt;&lt;span&gt;&amp;nbsp;in the lowstand&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;deposits&lt;/span&gt;&lt;span&gt;, and seismic profiles were ambiguous about the vertical extent of sand in these units. For these reasons, no total thickness of sand was determined from the lowstand&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;deposits&lt;/span&gt;&lt;span&gt;, but given the area of the&amp;nbsp;&lt;/span&gt;&lt;span class="single_highlight_class" onclick="highlight()"&gt;surficial&lt;/span&gt;&lt;span&gt;&amp;nbsp;sand, the volume is probably in the hundreds of millions of cubic meters.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1080/106411999273783</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Taylor &amp; Francis</dc:publisher>
  <dc:title>Surficial sediments along the inner continental shelf of Maine</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>