Benson, Richard H; Peypouquet, Jean Pierre (1983): (Appendix) Ostracodes at DSDP Leg 72 Holes [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.811745, Supplement to: Benson, RH; Peypouquet, JP (1983): The upper and mid-bathyal Cenozoic ostracode faunas of the Rio Grande Rise found on Leg 72 Deep Sea Drilling Project. In: Barker, PF; Carlson, RL; Johnson, DA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 72, 805-818, https://doi.org/10.2973/dsdp.proc.72.137.1983
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Abstract:
From the study of the ostracodes of Sites 516, 517, and 518 in comparison with those of Sites 21, 22, and 357, we can show that a time lag (early to late Oliogene) existed between the formation of the deep water masses (mid-bathyal ± 2000 m) and those of intermediate depths (upper bathyal ± 1000 m). The ostracode faunas suggest that while the Antarctic Intermediate Water (O2 = 4.5 to 5 ml/l) was flowing through the Vema Trough to fill the northern basins, the returning less-dense, warmer water (O2 = 3.5 to 5 ml/l) originating in Tethys was being gradually displaced upslope.
Efforts to identify shallow (less than 200 m) faunas were unsuccessful. No evidence of significant changes in paleodepth or close proximity to islands could be found that could not be better explained by water-mass changes.
Studies of the genera Poseidonamicus and Krithe suggest an important water mass change at about 14 Ma (late-middle Miocene), but the cause of this event is not yet understood.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -30.368325 * Median Longitude: -36.686675 * South-bound Latitude: -30.946800 * West-bound Longitude: -38.135300 * North-bound Latitude: -29.973700 * East-bound Longitude: -35.285000
Date/Time Start: 1980-03-11T00:00:00 * Date/Time End: 1980-04-02T00:00:00
Minimum Elevation: -3944.0 m * Maximum Elevation: -1313.0 m
Event(s):
72-516 * Latitude: -30.276300 * Longitude: -35.285200 * Date/Time: 1980-03-11T00:00:00 * Elevation: -1313.0 m * Penetration: 183.3 m * Recovery: 148.1 m * Location: South Atlantic/CONT RISE * Campaign: Leg72 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 40 cores; 166.1 m cored; 17.2 m drilled; 89.2 % recovery
72-516F * Latitude: -30.276500 * Longitude: -35.285000 * Date/Time: 1980-03-11T00:00:00 * Elevation: -1313.0 m * Penetration: 1270.6 m * Recovery: 690.1 m * Location: South Atlantic/CONT RISE * Campaign: Leg72 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 127 cores; 1092.5 m cored; 9 m drilled; 63.2 % recovery
72-517 * Latitude: -30.946800 * Longitude: -38.041200 * Date/Time: 1980-03-30T00:00:00 * Elevation: -2963.0 m * Penetration: 50.9 m * Recovery: 48.2 m * Location: South Atlantic/FLANK * Campaign: Leg72 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 12 cores; 50.9 m cored; 0 m drilled; 94.6 % recovery
Comment:
? = species uncertain.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Sample code/label | Sample label | Benson, Richard H | DSDP/ODP/IODP sample designation | ||
| 6 | Stage | Stage | Benson, Richard H | |||
| 7 | Nannofossil zone | Nannos zone | Benson, Richard H | |||
| 8 | Zone | Zone | Benson, Richard H | Ostracode zones (Benson, 1975; doi:10.1111/j.1502-3931.1975.tb00919.x) | ||
| 9 | Poseidonamicus sp. | Poseidonamicus sp. | # | Benson, Richard H | ||
| 10 | Henryhowella sp. | Henryhowella sp. | # | Benson, Richard H | ||
| 11 | Bythocythere sp. | Bythocythere sp. | # | Benson, Richard H | ||
| 12 | Cytheropteron sp. | Cytheropteron sp. | # | Benson, Richard H | ||
| 13 | Argilloecia sp. | Argilloecia sp. | # | Benson, Richard H | ||
| 14 | Atlanticythere sp. | Atlanticythere sp. | # | Benson, Richard H | ||
| 15 | Ambocythere sp. | Ambocythere sp. | # | Benson, Richard H | ||
| 16 | Cytheropteron sp. | Cytheropteron sp. | # | Benson, Richard H | ||
| 17 | Bradleya sp. | Bradleya sp. | # | Benson, Richard H | ||
| 18 | Krithe sp. | Krithe sp. | # | Benson, Richard H | ||
| 19 | Trachyleberis sp. | Trachyleberis sp. | # | Benson, Richard H | ||
| 20 | Echinocythereis ericea | E. ericea | # | Benson, Richard H | ||
| 21 | Rockallia sp. | Rockallia sp. | # | Benson, Richard H | ||
| 22 | Bythocythere sp. | Bythocythere sp. | # | Benson, Richard H | ||
| 23 | Cytherella sp. | Cytherella sp. | # | Benson, Richard H | ||
| 24 | Thalassocythere sp. | Thalassocythere sp. | # | Benson, Richard H | ||
| 25 | Abyssocythere sp. | Abyssocythere sp. | # | Benson, Richard H | ||
| 26 | Eucythere sp. | Eucythere sp. | # | Benson, Richard H | ||
| 27 | Bairdia sp. | Bairdia sp. | # | Benson, Richard H | ||
| 28 | Oxycythereis sp. | Oxycythereis sp. | # | Benson, Richard H | ||
| 29 | Suhmicythere sp. | Suhmicythere sp. | # | Benson, Richard H | ||
| 30 | Bythocypris sp. | Bythocypris sp. | # | Benson, Richard H | ||
| 31 | Eucythere sp. | Eucythere sp. | # | Benson, Richard H | ||
| 32 | Parakrithe sp. | Parakrithe sp. | # | Benson, Richard H | ||
| 33 | Cythereis sp. | Cythereis sp. | # | Benson, Richard H | ||
| 34 | Paracypris sp. | Paracypris sp. | # | Benson, Richard H | ||
| 35 | Parakrithe sp. | Parakrithe sp. | # | Benson, Richard H | ||
| 36 | Agrenocythere sp. | Agrenocythere sp. | # | Benson, Richard H | ||
| 37 | Cyprideis sp. | Cyprideis sp. | # | Benson, Richard H | ||
| 38 | Ostracoda indeterminata | Ostrac indet | # | Benson, Richard H | ||
| 39 | Hyphalocythere sp. | Hyphalocythere sp. | # | Benson, Richard H | ||
| 40 | Pelecocythere sp. | Pelecocythere sp. | # | Benson, Richard H |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1071 data points