Open AccessEssai d‘établissement d'une biostratigraphie du nannoplancton calcaire dans le Pleistocéne de I'Atlantique Nord‐oriental
Author(s) -
PUJOSLAMY ANNICK
Publication year - 1977
Publication title -
boreas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.95
H-Index - 74
eISSN - 1502-3885
pISSN - 0300-9483
DOI - 10.1111/j.1502-3885.1977.tb00297.x
Subject(s) - geology , pleistocene , emiliania huxleyi , ecological succession , biostratigraphy , quaternary , paleontology , oceanography , coccolith , genus , ecology , phytoplankton , biology , carbonate , nutrient , materials science , metallurgy
Sediments of two studied Quaternary cores from the north‐eastern Atlantic Ocean were rich in coccoliths. Some species were chosen, and are briefly discussed. In addition to Emiliania huxleyi and Pseudoemilicinia lacunosa , the importance of the Gephyrocapsa genus and especially the smallest forms of the group (G. aperta var. 1 and 2, G. ericsonii, G. protohuxleyi ) is shown. A summary of the morphological variations of the coccoliths of G. caribbranica and of Coccolithus doronicoides completes the study. The main qualitative and quantitative variations correspond to twenty stratigraphic events of the last 1,300,000 years. The same floral associations follow in succession in the two cores, which are located in different geographic and climatic areas, so it is possible to use them as a true biostratigraphy of the middle and upper Pleistocene of the north‐eastern Atlantic Ocean.