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      <marc:subfield code="a">MacNaughton, R. B., </marc:subfield>
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      <marc:subfield code="a">Neoproterozoic–Cambrian stratigraphy of the Mackenzie Mountains, northwestern Canada, part IV : </marc:subfield>
      <marc:subfield code="b">a stratigraphic reference section for the Ediacaran–Cambrian transition in NTS 95-M (Wrigley Lake map area) / </marc:subfield>
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      <marc:subfield code="c">2021.</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references (pages 53-56).</marc:subfield>
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      <marc:subfield code="a">"This report documents an upper Ediacaran-lower Cambrian stratigraphic reference section in the Wrigley Lake map area (NTS 95-M) of the Mackenzie Mountains, Northwest Territories. The Ediacaran-Cambrian transition is widely preserved across the Mackenzie Mountains and in the Wernecke Mountains of eastern Yukon, where research has focused on key localities identified during the 1960s, 1970s, and 1980s"--Introduction, page 2.</marc:subfield>
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      <marc:subfield code="a">Geological Survey of Canada, </marc:subfield>
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