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      <marc:subfield code="a">nl-----</marc:subfield>
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      <marc:subfield code="a">M183-2/1595E-PDF</marc:subfield>
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      <marc:subfield code="a">1986 Great Lakes seismic reflection survey, migrated data </marc:subfield>
      <marc:subfield code="h">[electronic resource] / </marc:subfield>
      <marc:subfield code="c">B. Milkereit ... [et al.].</marc:subfield>
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      <marc:subfield code="a">Great Lakes seismic reflection survey, migrated data</marc:subfield>
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      <marc:subfield code="a">[Ottawa] : </marc:subfield>
      <marc:subfield code="b">Natural Resources Canada, </marc:subfield>
      <marc:subfield code="c">1988.</marc:subfield>
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      <marc:subfield code="a">33 p. : </marc:subfield>
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      <marc:subfield code="a">Open file ; </marc:subfield>
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      <marc:subfield code="a">Historical publication digitized by the Geological Survey of Canada.</marc:subfield>
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      <marc:subfield code="a">Cover title.</marc:subfield>
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      <marc:subfield code="a">"1988."</marc:subfield>
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    <marc:datafield tag="500" ind1=" " ind2=" ">
      <marc:subfield code="a">Authors' affiliation: Lithospere and Canadian Shield Division, Geological Survey of Canada; Branch of Petroleum Geology, U.S. Geological Survey.</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="504" ind1=" " ind2=" ">
      <marc:subfield code="a">Includes bibliographical references (p. 15-16).</marc:subfield>
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    <marc:datafield tag="520" ind1="3" ind2=" ">
      <marc:subfield code="a">"As part of the Great Lakes International Multidisciplinary Program on Crustal Evolution (GLIMPCE), approximately 1350 km of deep reflection data were recorded along eight lines in Lakes Superior, Michigan and Huron. The survey was designed to resolve the deep structure of the Midcontinent Rift and the Hemlo and Michipicoten Granite/Greenstone Belts in Lake Superior, the Grenville Front and Huronian continental margin in Lake Huron and the Penokean Orogen and Niagara Fault in Lake Michigan. Data were generated using an approx. 128 litre airgun array, recorded with a 120 channel streamer, conventionally processed i~ CMP geometry, and migrated. The migrated data presented in this report are plotted at 1:200000. This format allows interested parties to interpret the data independently and to compare directly the results with a wide variety of seismic reflection data being released by other groups”--Abstract, p. 2.</marc:subfield>
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    <marc:datafield tag="546" ind1=" " ind2=" ">
      <marc:subfield code="a">Includes abstract in French.</marc:subfield>
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      <marc:subfield code="a">Lithoprobe (Project)</marc:subfield>
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      <marc:subfield code="a">Milkereit, Bernd,</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
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      <marc:subfield code="a">Geological Survey (U.S.)</marc:subfield>
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      <marc:subfield code="a">Geological Survey of Canada.</marc:subfield>
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      <marc:subfield code="a">Open file (Geological Survey of Canada)</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M183-2/M183-2-1595-eng.pdf</marc:subfield>
      <marc:subfield code="z">1986 Great Lakes seismic reflection survey, migrated data</marc:subfield>
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      <marc:subfield code="z">GLIMPCE reflection survey : Lake Superior - line A = Projet GLIMPCE - sismique réflexion : lac Supérieur - profil A</marc:subfield>
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