Miocene to Holocene diatom biostratigraphy of ODP Leg 105 sites

Diatoms occur sporadically in lower Miocene to Holocene sediments recovered at ODP Site 645 and in upper Pliocene to Holocene sediments at ODP Site 646. The diatom assemblage at Site 645 contains rare stratigraphic indicators. Fragmentation of frustules and the occurrence of species characteristic o...

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Bibliographic Details
Main Authors: Monjanel, Anne-Lise, Baldauf, Jack G
Format: Other/Unknown Material
Language:English
Published: PANGAEA 1989
Subjects:
105-645B
105-645C
105-645D
105-645E
105-645F
105-646A
105-646B
Baffin Bay
DRILL
Drilling/drill rig
Joides Resolution
Labrador Sea
Leg105
Ocean Drilling Program
ODP
Baffin
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.745236
https://doi.org/10.1594/PANGAEA.745236
Description
Summary:Diatoms occur sporadically in lower Miocene to Holocene sediments recovered at ODP Site 645 and in upper Pliocene to Holocene sediments at ODP Site 646. The diatom assemblage at Site 645 contains rare stratigraphic indicators. Fragmentation of frustules and the occurrence of species characteristic of high-latitude shelf, upper-slope environments suggest current transportation from the shelf. The diatom abundance and preservation at Site 646 probably reflect climatic changes and are also affected by dissolution, but it is not possible to detect the dominant factor. Therefore, the stratigraphic ranges of the primary and secondary biostratigraphic indicators are often unreliable.

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