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Migration of Pacific marine mollusc fauna into the North Atlantic across the Arctic Ocean in Pliocene and Early Pleistocene Time Símonarson, L.A.; Eiríksson, J. (2021). Migration of Pacific marine mollusc fauna into the North Atlantic across the Arctic Ocean in Pliocene and Early Pleistocene Time, in: Eiríksson, J. et al. Pacific - Atlantic mollusc migration: Pliocene inter-ocean gateway archives on Tjörnes, North Iceland. Topics in Geobiology, 52: pp. 841-867. https://dx.doi.org/10.1007/978-3-030-59663-7_14 In: Eiríksson, J.; Símonarson, L.A. (Ed.) (2021). Pacific - Atlantic mollusc migration: Pliocene inter-ocean gateway archives on Tjörnes, North Iceland. Topics in Geobiology, 52. Springer: Cham. e-ISBN 978-3-030-59663-7. X, 882 pp. https://dx.doi.org/10.1007/978-3-030-59663-7 In: Topics in Geobiology. Plenum: New York. ISSN 0275-0120

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Beschikbaar in	Auteurs
VLIZ: Non-open access 363561 [ aanvragen ]

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Trefwoorden

Iceland Molluscs Mollusca [WoRMS] Iceland [Marine Regions]

Author keywords

Mollusc migration, Bering Strait pathway, Iceland, Tjörnes, Atlantic-Pacific interoceanic connection

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Auteurs		Top
Símonarson, L.A. Eiríksson, J.

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Abstract

The Tjörnes sequence documents an exchange of molluscs between the North Pacific and the Arctic and North Atlantic Oceans. Before the Pliocene, the main open passage between the Atlantic and the Pacific was through the Central American Seaway. A Beringian land bridge prevented exchange of marine biota in the northern region. The Bering Strait was probably opened towards the termination of the Miocene at 5.3 Ma, and the final closure of the Central American Seaway took place at about 2.7 Ma. At least 34 molluscan species of Pacific ancestry reached Iceland during the Pliocene and three species reached Iceland, while the Lower Pleistocene part of the Breiðavík Group on Tjörnes was deposited. The major migration of Pacific species into the Tjörnes area is manifested at the base of the Serripes biozone of the Barmur Group of the Tjörnes sequence at about 3.8 Ma. This was preceded by earlier appearances of mollusc species close to the Miocene-Pliocene boundary. Mollusc migration into the Tjörnes area was not a single, abrupt event, but occurred at various times during the Pliocene and Lower Pleistocene. Some of these species of Pacific origin have subsequently dominated boreal, subarctic, and arctic molluscan assemblages in the North Atlantic.

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