(Table 1) Relative abundance of planktonic foraminifers in ODP Hole 164-997A sediments ...

• Main Authors: Nishi, Hiroshi, Norris, Richard D, Okada, Hisatake
• Format: Dataset
• Language: English
• Published: PANGAEA 2000
• Subjects: Sample code/label; DEPTH, sediment/rock; Aliquot value; Beella digitata; Bolliella calida; Candeina nitida; Globigerina bulloides; Globigerina decoraperta; Globigerina falconensis; Globigerina cf. foliata; Globigerina quinqueloba; Globigerina rubescens; Globigerina umbilicata; Globigerinella aequilateralis; Globigerinita glutinata; Globigerinoides conglobatus; Globigerinoides extremus; Globigerinoides obliquus; Globigerinoides quadrilobatus; Globigerinoides ruber; Globigerinoides sacculifer; Globigerinoides tenellus; Globorotalia bermudezi; Globorotalia aff. cavernula; Globorotalia crassaformis; Globorotalia crassula; Globorotalia exilis; Globorotalia fimbriata; Globorotalia hessi; Globorotalia hirsuta; Globorotalia incisa; Globorotalia inflata; Globorotalia menardii; Globorotalia puncticulata; Globorotalia ronda; Globorotalia scitula; Globorotalia tosaensis; Globorotalia truncatulinoides; Globorotalia tumida; Globorotalia ungulata; Globorotalia viola; Globorotalia wilesi; Globorotaloides hexagonus; Hastigerina pelagica; Neogloboquadrina dutertrei; Neogloboquadrina cf. dutertrei; Neogloboquadrina pseudopima; Neogloboquadrina pachyderma; Globoquadrina conglomerata; Orbulina bilobata
• Online Access: https://dx.doi.org/10.1594/pangaea.804482; https://doi.pangaea.de/10.1594/PANGAEA.804482

Hole 997A was drilled during Leg 164 of the Ocean Drilling Program at a depth of 2770 m on the topographic crest of the Blake Ridge in the western Atlantic Ocean. We report here an analysis of the faunal assemblages of planktonic foraminifers in a total of 91 samples (0.39-91.89 mbsf interval) spanning the last 2.15 m.y., latest Pliocene to Holocene. The abundant species, Globigerinoides ruber, Globigerinoides sacculifer, Neogloboquadrina dutertrei, Globorotalia inflata, and Globigerinita glutinata together exceed over ~70% of the total fauna. Each species exhibits fluctuations with amplitudes of 10%-20% or more. Despite their generally low abundance, the distinct presence/absence behavior of the Globorotalia menardii group is almost synchronous with glacial-interglacial climate cycles during the upper part of Brunhes Chron.The quantitative study and factor analysis of planktonic foraminiferal assemblages shows that the planktonic foraminiferal fauna in Hole 997A consists of four groups: warm water, ... : Sediment depth is given in mbsf. Samples (10 cm**3 in size) were washed through a 63-µm sieve using water. Population counts of planktonic foraminifers were based on aliquot samples containing 200 or more specimens in the size fraction larger than 177 µm. ...