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Smit, J; van Kempen, Th MG (1987): (Table 1) Distribution of planktonic foraminifera in the Paleocene/Cretaceous section of DSDP Hole 93-605. PANGAEA,, Supplement to: Smit, J; van Kempen, TMG (1987): Planktonic foraminifers from the Cretaceous/Tertiary boundary at Deep Sea Drilling Project Site 605, North Atlantic. In: van Hinte, JE; Wise, SW Jr; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 93, 549-553,

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Analysis of planktonic foraminifers from Section 605-66-1 established the Cretaceous/Tertiary (K/T) boundary between 68 and 73 cm. Comparison with the detailed zonation established at El Kef, Tunisia, indicates that some of the section may be missing, probably because of drilling disturbance. The preservation of the planktonic foraminifers is generally good, particularly in the basal Paleocene section. However, extensive dissolution and the many broken specimens render quantitative estimates unreliable. There were no microtektite-like spherules to suggest a layer rich in extraterrestrial components, as have been found in most complete pelagic K/T boundary sections. The better preservation of Paleocene foraminiferal test in this core and in many other DSDP cores from other basins is probably due to a change in oceanic carbonate chemistry exactly at the K/T boundary. This may have been caused by a temporary and almost complete disappearance of carbonate-fixing organisms at the boundary.
Related to:
DSDP (1989): Data from the Deep Sea Drilling Project. Sediment, hard rock and reference files. National Geophysical Data Center, National Environmental Satellite, Data and Information Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce, 1, CD-ROM
Latitude: 38.742200 * Longitude: -72.609200
Date/Time Start: 1983-06-11T00:00:00 * Date/Time End: 1983-06-11T00:00:00
Minimum DEPTH, sediment/rock: 759.35 m * Maximum DEPTH, sediment/rock: 759.84 m
93-605 * Latitude: 38.742200 * Longitude: -72.609200 * Date/Time: 1983-06-11T00:00:00 * Elevation: -2194.0 m * Penetration: 816.7 m * Recovery: 532 m * Location: North Atlantic * Campaign: Leg93 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 69 cores; 652.8 m cored; 9.6 m drilled; 81.5 % recovery
D = dissolved, P = present, C = common, ? = questionable, - = absent.
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelSmit, JDSDP/ODP/IODP sample designation
2DEPTH, sediment/rockDepth sedmGeocode
3EpochEpochSmit, J
4Globotruncana sp.Globotruncana sp.Smit, J
5Globotruncana arcaG. arcaSmit, J
6Globotruncana elevataG. elevataSmit, J
7Globotruncana fornicataG. fornicataSmit, J
8Globotruncana contusaG. contusaSmit, J
9Globotruncana stuartiG. stuartiSmit, J
10Globotruncana falsostuartiG. falsostuartiSmit, J
11Rugoglobigerina sp.Rugoglobigerina sp.Smit, J
12Rugoglobigerina rugosaR. rugosaSmit, J
13Trinitella scottiT. scottiSmit, J
14Globotruncanella caravacaensisG. caravacaensisSmit, J
15Globotruncanella havanensisG. havanensisSmit, J
16Globotruncanella monmouthensisG. monmouthensisSmit, J
17Globotruncanella petaloideaG. petaloideaSmit, J
18Globigerinelloides asperaG. asperaSmit, J
19Globigerinelloides messinaeG. messinaeSmit, J
20Planoglobulina sp.Planoglobulina sp.Smit, J
21Racemiguembelina fructicosaR. fructicosaSmit, J
22Pseudotextularia sp.Pseudotextularia sp.Smit, J
23Heterohelix sp.Heterohelix sp.Smit, J
24Abathomphalus intermediusA. intermediusSmit, J
25Abathomphalus mayaroensisA. mayaroensisSmit, J
26Guembelitria cretaceaG. cretaceaSmit, J
27Chiloguembelina midwayensisC. midwayensisSmit, J
28Chiloguembelina sp.Chiloguembelina sp.Smit, J
29Eoglobigerina editaE. editaSmit, J
30Eoglobigerina sp.Eoglobigerina sp.Smit, J
31Globigerina pseudobulloidesG. pseudobulloidesSmit, J
32Globigerina triloculinoidesG. triloculinoidesSmit, J
33Planorotalites compressusP. compressusSmit, J
34Globoconusa daubjergensisG. daubjergensisSmit, J
264 data points

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