21. CALPIONELLIDS AND THE JURASSIC/CRETACEOUS BOUNDARY AT DEEP SEA DRILLING PROJECT SITE 534, WESTERN NORTH ATLANTIC OCEAN1
Calpionellids occur from Section 534A-87-2 in the lowermost Blake-Bahama Formation down to Section 534A-93-4 in the uppermost Cat Gap Formation. Stratigraphically significant faunas have only been observed between Sections 534A-90-2 and 534A-93-1, indicating calpionellid Zone B (latest Tithonian to...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.494.4470 2023-05-15T17:29:28+02:00 21. CALPIONELLIDS AND THE JURASSIC/CRETACEOUS BOUNDARY AT DEEP SEA DRILLING PROJECT SITE 534, WESTERN NORTH ATLANTIC OCEAN1 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.4470 http://www.deepseadrilling.org/76/volume/dsdp76_21.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.4470 http://www.deepseadrilling.org/76/volume/dsdp76_21.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.deepseadrilling.org/76/volume/dsdp76_21.pdf text ftciteseerx 2016-01-08T08:41:44Z Calpionellids occur from Section 534A-87-2 in the lowermost Blake-Bahama Formation down to Section 534A-93-4 in the uppermost Cat Gap Formation. Stratigraphically significant faunas have only been observed between Sections 534A-90-2 and 534A-93-1, indicating calpionellid Zone B (latest Tithonian to earliest Berriasian) for the interval from Sections 534A-90-2 through 534A-92-2 and Zone A (early late Tithonian) for the interval from Sections 534A-92-6 through 534A-93-1. In southeastern France, the Jurassic/Cretaceous boundary, as defined by ammonites, lies in the middle of Zone B. In Hole 534A, the boundary can be placed in the lower half of Core 90. A strange fact, which cannot yet be explained in a satisfactory manner, is the complete absence of mid-Berriasian through early Valanginian calpionellid associations (Zones C, D, and E), not only at this site, but apparently over most of the western North Atlantic. Text North Atlantic Unknown |
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Calpionellids occur from Section 534A-87-2 in the lowermost Blake-Bahama Formation down to Section 534A-93-4 in the uppermost Cat Gap Formation. Stratigraphically significant faunas have only been observed between Sections 534A-90-2 and 534A-93-1, indicating calpionellid Zone B (latest Tithonian to earliest Berriasian) for the interval from Sections 534A-90-2 through 534A-92-2 and Zone A (early late Tithonian) for the interval from Sections 534A-92-6 through 534A-93-1. In southeastern France, the Jurassic/Cretaceous boundary, as defined by ammonites, lies in the middle of Zone B. In Hole 534A, the boundary can be placed in the lower half of Core 90. A strange fact, which cannot yet be explained in a satisfactory manner, is the complete absence of mid-Berriasian through early Valanginian calpionellid associations (Zones C, D, and E), not only at this site, but apparently over most of the western North Atlantic. |
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The Pennsylvania State University CiteSeerX Archives |
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21. CALPIONELLIDS AND THE JURASSIC/CRETACEOUS BOUNDARY AT DEEP SEA DRILLING PROJECT SITE 534, WESTERN NORTH ATLANTIC OCEAN1 |
spellingShingle |
21. CALPIONELLIDS AND THE JURASSIC/CRETACEOUS BOUNDARY AT DEEP SEA DRILLING PROJECT SITE 534, WESTERN NORTH ATLANTIC OCEAN1 |
title_short |
21. CALPIONELLIDS AND THE JURASSIC/CRETACEOUS BOUNDARY AT DEEP SEA DRILLING PROJECT SITE 534, WESTERN NORTH ATLANTIC OCEAN1 |
title_full |
21. CALPIONELLIDS AND THE JURASSIC/CRETACEOUS BOUNDARY AT DEEP SEA DRILLING PROJECT SITE 534, WESTERN NORTH ATLANTIC OCEAN1 |
title_fullStr |
21. CALPIONELLIDS AND THE JURASSIC/CRETACEOUS BOUNDARY AT DEEP SEA DRILLING PROJECT SITE 534, WESTERN NORTH ATLANTIC OCEAN1 |
title_full_unstemmed |
21. CALPIONELLIDS AND THE JURASSIC/CRETACEOUS BOUNDARY AT DEEP SEA DRILLING PROJECT SITE 534, WESTERN NORTH ATLANTIC OCEAN1 |
title_sort |
21. calpionellids and the jurassic/cretaceous boundary at deep sea drilling project site 534, western north atlantic ocean1 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.4470 http://www.deepseadrilling.org/76/volume/dsdp76_21.pdf |
genre |
North Atlantic |
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North Atlantic |
op_source |
http://www.deepseadrilling.org/76/volume/dsdp76_21.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.494.4470 http://www.deepseadrilling.org/76/volume/dsdp76_21.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766123608162172928 |