(Figure 4) Stratigraphic distribution of planktonic foraminifera in DSDP Hole 93-604

• Main Author: Moullade, Michel
• Format: Dataset
• Language: English
• Published: PANGAEA 1987
• Subjects: 93-604; Deep Sea Drilling Project; DEPTH; sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Epoch; Globigerina bulloides; Globigerina nepenthes; Globigerina praebulloides; Globigerinita glutinata; Globigerinoides conglobatus; Globigerinoides obliquus; Globigerinoides quadrilobatus sacculifer; Globigerinoides quadrilobatus trilobatus; Globigerinoides ruber roseus; Globigerinoides ruber var. alba; Globoquadrina altispira; Globorotalia crassaformis; Globorotalia hirsuta; Globorotalia inflata; Globorotalia margaritae; Globorotalia menardii; Globorotalia merotumida; Globorotalia miocenica; Globorotalia plesiotumida; Globorotalia praehirsuta; Globorotalia praemiocenica; Globorotalia puncticulata; Globorotalia scitula; Globorotalia tosaensis; Globorotalia truncatulinoides; Globorotalia tumida; Globorotalia ungulata; Glomar Challenger; Leg93; Neogloboquadrina acostaensis; Neogloboquadrina cf. atlantica; Neogloboquadrina dutertrei; Neogloboquadrina humerosa; Neogloboquadrina pachyderma; North Atlantic/CONT RISE; Orbulina suturalis; Orbulina universa; Planktic foraminifera zone; Pulleniatina finalis; Pulleniatina obliquiloculata; Sample code/label; North Atlantic; Planktonic foraminifera
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.250663; https://doi.org/10.1594/PANGAEA.250663

During Deep Sea Drilling Project Leg 93, upper Miocene through Quaternary sediments were continuously cored in Hole 604, located on the upper continental rise of the New Jersey transect (western North Atlantic). A detailed biostratigraphic study of these strata has been made using the vertical distribution of planktonic foraminifers. The Quaternary climatic zonation of Ericson and Wollin (1968) has been tentatively delineated and all the Pliocene zones and subzones (sensu Berggren, 1977) have been recognized. The rate of sedimentation was slow during most of the Pliocene but underwent a significant acceleration in the early Pleistocene. Quantitative variations in the distribution of planktonic foraminifers appear to be influenced by various factors, such as hydrodynamic winnowing resulting from the action of bottom currents and surficial thermal conditions caused by climatic changes. Both dissolution intervals and brief increases in the coarser detrital input seem, most of the time, to be correlated with indications of climatic cooling and may correspond to glacial events or cycles. This chapter delineates a precursor stage in the inception of Northern Hemisphere glaciation at 3 Ma and wide-scale Quaternary glacial-interglacial cycles. Data from a detailed study of Hole 604 are briefly compared with the main sedimentary and microfaunal features of contemporaneous series previously drilled along the east American margin in the northwestern Atlantic. One of the striking observations appears to be the intense redistribution of sediments that affected this region in Neogene-Quaternary times.