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Titolo:
Bivalve palaeobiogeography and the Hispanic Corridor: time of opening and effectiveness of a proto-Atlantic seaway
Autore:
Aberhan, M;
Indirizzi:
Museum Nat Kunde, Inst Palaontol, D-10115 Berlin, Germany Museum Nat Kunde Berlin Germany D-10115 laontol, D-10115 Berlin, Germany
Titolo Testata:
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
fascicolo: 3-4, volume: 165, anno: 2001,
pagine: 375 - 394
SICI:
0031-0182(20010115)165:3-4<375:BPATHC>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
BENTHIC MACROINVERTEBRATE ASSOCIATIONS; CANADIAN CORDILLERA; SOUTH-AMERICA; RIFT SYSTEM; PACIFIC; PALEOBIOGEOGRAPHY; EVOLUTION; CLIMATE; TETHYS; PATTERNS;
Keywords:
bivalves; Hispanic corridor; Jurassic; palaeobiogeography; palaeoceanography;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
131
Recensione:
Indirizzi per estratti:
Indirizzo: Aberhan, M Museum Nat Kunde, Inst Palaontol, Invalidenstr 43, D-10115 Berlin, Germany Museum Nat Kunde Invalidenstr 43 Berlin Germany D-10115 ermany
Citazione:
M. Aberhan, "Bivalve palaeobiogeography and the Hispanic Corridor: time of opening and effectiveness of a proto-Atlantic seaway", PALAEOGEO P, 165(3-4), 2001, pp. 375-394

Abstract

The Hispanic Corridor is an embryonic seaway between the eastern Pacific and western Tethyan oceans that has been postulated to have preceded Middle Jurassic drifting and the birth of the Atlantic Ocean by many millions of years. In this study the distribution of pectinoid bivalve morphotypes is analysed to examine the origin of the Hispanic Corridor and its effectivenessduring Early Jurassic times. A comparison of pectinoid faunal similarities, based on similarity coefficients, between various regions at opposite ends of the Corridor suggests that it opened progressively during Early Jurassic times. However, with this approach it is difficult to exclude alternative dispersal routes, and to determine when faunal interchange began. Analysis of the percentage of pectinoid morphotypes that were (1) present at opposite sides of the Corridor, (2) simultaneously absent in the western Pacific/eastern Tethys and (3) confined to relatively low palaeolatitudes providesevidence that the Hispanic Corridor developed from an effective barrier inearlier Early Jurassic (Hettangian to Sinemurian) times into a filter, allowing the passage of a few morphotypes, during later Early Jurassic (Pliensbachian and Toarcian) times. The apparently two-way faunal exchange throughthe Hispanic Corridor is consistent with the establishment of a megamonsoonal circulation for Pangaea, which may have caused seasonally changing directions of oceanic surface currents through the Corridor. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 22:24:55