Sancetta, Constance A (1983): (Table 1) Sample levels of diatom and silicoflagellate datums at DSDP Holes 69-504 and 69-505 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.816189, Supplement to: Sancetta, CA (1983): Biostratigraphic and paleoceanographic events in the Eastern Equatorial Pacific: results of Deep Sea Drilling Project Leg 69. In: Cann, JR; Langseth, MG; Honnorez, J; Von Herzen, RP; White, SM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office)Government Printing Office, 69, 311-320, https://doi.org/10.2973/dsdp.proc.69.112.1983
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Abstract:
A standard biostratigraphic system, based upon diatom datum levels previously correlated to the paleomagnetic record, was applied to Deep Sea Drilling Project Sites 501/504 and 505. Sedimentation appears to have been constant at the three sites, averaging 50 m/m.y. at Sites 501/504 and 60 m/m.y. at Site 505. Calcium carbonate is rather poorly preserved at both sites, because of depth of water and, at Sites 501/504, alteration by diagenesis. Siliceous microfossils are common and moderately well preserved at the three sites; at Sites 501/504, diatoms disappear abruptly below the first occurrence of chert. The uppermost Miocene diatom assemblage occurs just above chert and is characterized by a strong dominance of Thalassionema and Thalassiothrix, which implies very high silica production during the latest Miocene; the chert probably is derived from a similar assemblage. In the earliest Pliocene, silica production appears to have decreased sharply; about 3 Ma, preservation of calcium carbonate also diminished, suggesting a shoaling of the CCD. At 2 Ma, there occurred a short interval of low production of both calcium carbonate and silica, which lasted into the earliest Pleistocene.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 1.569800 * Median Longitude: -83.761100 * South-bound Latitude: 1.226300 * West-bound Longitude: -83.790000 * North-bound Latitude: 1.913300 * East-bound Longitude: -83.732200
Date/Time Start: 1979-09-20T00:00:00 * Date/Time End: 1979-09-29T00:00:00
Minimum Elevation: -3537.0 m * Maximum Elevation: -3460.0 m
Event(s):
69-504 * Latitude: 1.226300 * Longitude: -83.732200 * Date/Time: 1979-09-20T00:00:00 * Elevation: -3460.0 m * Penetration: 237 m * Recovery: 10 m * Campaign: Leg69 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL)
69-505 * Latitude: 1.913300 * Longitude: -83.790000 * Date/Time: 1979-09-29T00:00:00 * Elevation: -3537.0 m * Penetration: 242 m * Recovery: 187.1 m * Location: North Pacific/GRABEN * Campaign: Leg69 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 26 cores; 223 m cored; 0 m drilled; 83.9 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Sancetta, Constance A | DSDP/ODP/IODP sample designation | ||
| 3 | Ageprofile Datum Description | Ageprof dat des | Sancetta, Constance A | T = top of range (extinction); B = base of range (first appearance) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
42 data points