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Giosan, Liviu; Flood, Roger D; Gruetzner, Jens; Mudie, Peta J (2002): (Table 1) Upper Carboniferous spores abundances from ODP Holes 172-1062B, 172-1063A and 172-1063B. PANGAEA,, Supplement to: Giosan, L et al. (2002): Paleoceanographic significance of sediment color on western North Atlantic Drifts: II. Late Pliocene-Pleistocene sedimentation. Marine Geology, 189(1-2), 43-61,

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Color variations were interpreted in paleoceanographic terms for the late Pliocene-Pleistocene sediments recovered by ODP Leg 172 on deep-sea drifts at Blake-Bahama Outer Ridge and northeastern Bermuda Rise. The color-derived parameters used in interpretation included predicted carbonate content, terrigenous fluxes, and hematite content. Abundance of Upper Carboniferous spores indicates that the hematite is probably derived from the Permo-Carboniferous red beds of the Canadian Maritimes. In the last 800 kyr sedimentation pattern changes on the Blake-Bahama Outer Ridge were determined by the sediment delivery to the deep basin as well as circulation changes. Sediment delivery increased during glacials (especially during the last 500 kyr and particularly since Stage 6). A fundamental change in the thermohaline circulation occurred at about 500 ka corresponding to the end of the Mid-Pleistocene Transition period at the onset of the predominant 100-kyr climate cyclicity. Sedimentation related to WBUC had intensified at that time and had become more focused at depths below 3000 m. Changes in hematite content and sedimentation rate show a pulse of sediment via the St. Lawrence outlet at the Pliocene-Pleistocene boundary suggesting that a likely change in the hydrography/physiography of the Laurentide Ice Sheet could have been involved in the climatic and ocean circulation changes at that time.
Median Latitude: 31.873220 * Median Longitude: -63.212293 * South-bound Latitude: 28.246470 * West-bound Longitude: -74.407000 * North-bound Latitude: 33.686720 * East-bound Longitude: -57.614940
Date/Time Start: 1997-03-15T23:45:00 * Date/Time End: 1997-03-31T02:10:00
Minimum Elevation: -4763.0 m * Maximum Elevation: -4583.0 m
172-1062B * Latitude: 28.246470 * Longitude: -74.407000 * Date/Time Start: 1997-03-15T23:45:00 * Date/Time End: 1997-03-17T06:25:00 * Elevation: -4763.0 m * Penetration: 248.6 m * Recovery: 239.08 m * Location: Blake-Bahama Outer Ridge, North Atlantic Ocean * Campaign: Leg172 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 26 cores; 239 m cored; 9.6 m drilled; 100 % recovery
172-1063A * Latitude: 33.686720 * Longitude: -57.614940 * Date/Time Start: 1997-03-25T01:19:00 * Date/Time End: 1997-03-28T23:30:00 * Elevation: -4583.5 m * Penetration: 418.4 m * Recovery: 400.4 m * Location: Blake-Bahama Outer Ridge, North Atlantic Ocean * Campaign: Leg172 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 418.4 m cored; 0 m drilled; 95.7 % recovery
172-1063B * Latitude: 33.686470 * Longitude: -57.614940 * Date/Time Start: 1997-03-28T23:30:00 * Date/Time End: 1997-03-31T02:10:00 * Elevation: -4583.0 m * Penetration: 351.6 m * Recovery: 341.95 m * Location: Blake-Bahama Outer Ridge, North Atlantic Ocean * Campaign: Leg172 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 38 cores; 351.6 m cored; 0 m drilled; 97.3 % recovery
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Sample code/labelSample labelGiosan, LiviuDSDP/ODP/IODP sample designation
3Color descriptionColor descGiosan, Liviu
4Age, minimum/youngAge minkaGiosan, Liviu
5Age, maximum/oldAge maxkaGiosan, Liviu
6LycosporaLycos#Giosan, LiviuSmear slide analysis
7PunctatisporitesPunctatisporites#Giosan, LiviuSmear slide analysis
8TriquitritesTriquitrites#Giosan, LiviuSmear slide analysis
9LophotriletesLophotriletes#Giosan, LiviuSmear slide analysis
10MurosporaMurospora#Giosan, LiviuSmear slide analysis
11VerrucosisporitesVerrucosisporites#Giosan, LiviuSmear slide analysis
12ConverrucosisporitesConverrucosisporites#Giosan, LiviuSmear slide analysis
13LeiotriletesLeiotriletes#Giosan, LiviuSmear slide analysis
14LaevigatosporitesLaevigatosporites#Giosan, LiviuSmear slide analysis
15FlorinitesFlorinites#Giosan, LiviuSmear slide analysis
16DensosporitesDensosporites#Giosan, LiviuSmear slide analysis
17ApiculatisporisApiculatisporis#Giosan, LiviuSmear slide analysis
18Spores indeterminataSpo.indet#Giosan, LiviuCounting, palynology
19Total countsTotal counts#Giosan, Liviu
126 data points

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