(Table 1) Distribution of upper Campanian-lower Maestrichtian calcareous nannofossils at DSDP Hole 71-511 ...

Calcareous nannofossils from upper Campanian-lower Maestrichtian Deep Sea Drilling Project Leg 71 Cores 511-23 and 511-24 are described and correlated with assemblages of similar age from piston and drill cores on the Falkland Plateau, South Atlantic Ocean. The Leg 71 cores partially fill a drilling...

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Bibliographic Details
Main Authors: Wind, Frank H, Wise, Sherwood W
Format: Dataset
Language:English
Published: PANGAEA 1983
Subjects:
Online Access:https://dx.doi.org/10.1594/pangaea.815175
https://doi.pangaea.de/10.1594/PANGAEA.815175
Description
Summary:Calcareous nannofossils from upper Campanian-lower Maestrichtian Deep Sea Drilling Project Leg 71 Cores 511-23 and 511-24 are described and correlated with assemblages of similar age from piston and drill cores on the Falkland Plateau, South Atlantic Ocean. The Leg 71 cores partially fill a drilling gap of at least 20 meters left within a thick (50 m) carbonate section first drilled by DSDP Leg 36 at Site 327. Cores 511-23 and 511-24 both fall within the upper portion of the Biscutum coronum Zone of Wind and demonstrate an overlap in the range of Monomarginatus quaternarius with the ranges of M. pectinatus, Misceomarginatus pleniporus, and Biscutum coronum across the Campanian/ Maestrichtian boundary. Resolution of the sequence of highest occurrence datums for the latter species must await the recovery of a more complete section. Comparison of the Site 511 assemblages with those from Mas Orcadas Core 07-75-44 to the north confirms earlier speculation that the Falkland Plateau served as an important boundary ... : Sediment depth is given in mbsf. Abundance abbreviations = A - abundant; C - common; F - few; R - rare; P - present; B - barren; fr - fragment; - - none present. Lilhraphidiles praequadratus found by scanning electron microscope in sample 71-511-24-3,15-17. ...