The Canary record of the evolution of the North Atlantic Pliocene: New Ar-40/Ar-39 ages and some notable palaeontological evidence

Two new 40Ar/39Ar ages (*) and previously published K/Ar ages of basaltic pillow lava flows are coeval with closely-related fossiliferous marine layers, allowing us to establish the beginning (5.8; 5.0; 4.8Ma at Ajuí, Fuerteventura Island and 4.8±0.03Ma (2?)* at Tamaraceite) and a middle stage (4.20...

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Bibliographic Details
Published in:Palaeogeography, Palaeoclimatology, Palaeoecology
Main Authors: Meco, J., Koppers, Anthony A. P., Miggins, Daniel P., Lomoschitz, Alejandro, Betancort-Lozano, Juan Francisco
Other Authors: 6602093969, 6602493927, 26039326000, 6507150380, 6602503518
Format: Article in Journal/Newspaper
Language:English
Published: 2016
Subjects:
24 Ciencias de la vida
2416 Paleontología
Canary current origin
Early Pliocene biogeography
Pliocene climatic evolution
Pliocene Canarian fossils
Fossil Argonauta argo
Esfinge
North Atlantic
Online Access:http://hdl.handle.net/10553/17950
https://doi.org/10.1016/j.palaeo.2015.05.027
Description
Summary:Two new 40Ar/39Ar ages (*) and previously published K/Ar ages of basaltic pillow lava flows are coeval with closely-related fossiliferous marine layers, allowing us to establish the beginning (5.8; 5.0; 4.8Ma at Ajuí, Fuerteventura Island and 4.8±0.03Ma (2?)* at Tamaraceite) and a middle stage (4.20±0.18Ma (2?)* at La Esfinge in Gran Canaria Island) of Early Pliocene marine deposits in the Canary Islands. Here the presence of tropicopolitan fossils (Megaselachus megalodon, Janthina typica) suggests the influence of a possible Central American Circumtropical Current during the Pliocene and in the North Atlantic basin. 69 53

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