| Reference Type | Journal (article/letter/editorial) |
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| Title | The Ordovician–Silurian boundary, northern Canadian Cordillera: graptolite and conodont correlation |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Lenz, A. C. | Author |
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| McCracken, A. D. | Author |
| Year | 1982 (June 1) | Volume | 19 |
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| Issue | 6 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e82-111Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 477546 | Long-form Identifier | mindat:1:5:477546:5 |
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| GUID | 0 |
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| Full Reference | Lenz, A. C., McCracken, A. D. (1982) The Ordovician–Silurian boundary, northern Canadian Cordillera: graptolite and conodont correlation. Canadian Journal of Earth Sciences, 19 (6) 1308-1322 doi:10.1139/e82-111 |
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| Plain Text | Lenz, A. C., McCracken, A. D. (1982) The Ordovician–Silurian boundary, northern Canadian Cordillera: graptolite and conodont correlation. Canadian Journal of Earth Sciences, 19 (6) 1308-1322 doi:10.1139/e82-111 |
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| In | (1982, June) Canadian Journal of Earth Sciences Vol. 19 (6) Canadian Science Publishing |
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| Abstract/Notes | The Upper Ordovician graptolite facies of the northern Canadian Cordillera is divided into two biostratigraphic units, the Dicellograptus ornatus Zone and the Pacificograptus pacificus Zone. Interbedded limestone yielded conodont Fauna 12. The uppermost Ordovician equivalents to the graptolite Climacograptus extraordinarius Zone and conodont Fauna 13 are absent, signifying a widespread stratigraphic hiatus probably attributable to the effects of glacially induced regression.The lowest Silurian graptolite fauna, of the Glyptograptus persculptus Zone, is tentatively identified in some sections, although it is absent in others. Conodonts from the zone, although present, are not diagnostic.Thicknesses of the lowest Silurian G. persculptus Zone sediments are anomalously high in comparison with average thicknesses of the zone elsewhere in the world. |
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