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  • Data  (155)
  • 1980-1984  (155)
  • 1984  (155)
Collection
Source
Keywords
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  • 1980-1984  (155)
Year
  • 1
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    Unknown
    Age model of sediment core RC10-216 (1984)
    PANGAEA
    In:  Supplement to: Sancetta, Constance A; Silvestri, Shaymaria (1984): Diatom stratigraphy of the late Pleistocene (Brunhes) subarctic Pacific. Marine Micropaleontology, 9(3), 263-274, https://doi.org/10.1016/0377-8398(84)90016-1
    Details
    Publication Date: 2024-05-02
    Description: Three piston cores in the subarctic region of the North Pacific show consistent changes in relative abundance of diatom species throughout the Brunhes magnetic epoch. These events can be used both as stratigraphic markers to subdivide the interval and as indicators of oceanographic conditions. The stratigraphic record shows an acme for A. ochotensis from about 625-350 Kyr (Isotope Stages 15-10); a marked increase in amplitude of abundance fluctuations for R. hebetata 300-0 Kyr (Stages 8-1), the extinction of R. curvirostris at 276 Kyr (Stage 8), and abundance fluctuations of D. seminae roughly in phase with the global oxygen isotope record from 450-0 Kyr (Stages 12-1). In the subarctic Pacific, an abrupt change in species abundance is not a reliable indicator of hiatus occurrence. Although details are not clear, there appears to have been a fundamental change of the subarctic gyre during the middle Brunhes (Stages 10-8 time), with more intense glacial intervals and stronger glacial-interglacial contrast occurring after that time. Coarse clastic detritus is not restricted to glacial intervals, suggesting that ice-rafting has occurred throughout the Brunhes interval; peak levels of ice-rafting may occur during ice-growth and decay, as well as during short intervals within a stage.
    Keywords: Age model; Calculated; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC10; RC10-216; Robert Conrad; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 3 data points
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    DATA PANGAEA
  • 2
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    Annotated record of the detailed examination of Mn deposits from ARA Islas Orcadas Cruise 13-14 core stations (1984)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Keywords: Comment; Deposit type; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Description; Event label; Identification; IO13-1477; IO13-1477.001-PC; IO13-1477.006-PC; Islas Orcadas; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; PC; Piston corer; Position; Quantity of deposit; Sediment type; Size; South Atlantic Ocean; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 57 data points
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    DATA PANGAEA
  • 3
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    Unknown
    Annotated record of the detailed examination of Mn deposits from DSDP Leg 73 (Holes 527519A, 520, 521, 522, 522A, 522B, 524) (1984)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Leg 73 was the middle of five legs on South Atlantic paleoenvironments planned by the JOIDES Ocean Paleoenvironment (OP) Panel during the years from 1975 to 1980. The idea of drilling a transect of holes across the 30°S parallel was entertained soon after the drilling on Leg 3, during the first phase of the Deep Sea Drilling Project (1968/69), when the surprising discovery was made that the middle Miocene sediments of the South Atlantic were largely marls and red clays. The deposition of the red clays was obviously related to the intense dissolution of calcite during the middle Miocene, when the calcite-compensation level was elevated. The objectives and tactical planning for a transect across the east flank of the Mid-Atlantic Ridge just north of 30°S were outlined by the OP Panel more fully to the Planning Committee in July of 1978. After a piston core containing Paleocene sediments was taken in 1979 at the site in the Cape Basin at the foot of the Walvis Ridge this area was designated for DSDP Leg 73 and 74.
    Keywords: 73-519A; 73-520; 73-521; 73-522; 73-522A; 73-522B; 73-523; 73-524; Comment; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; Elevation of event; Event label; File name; Glomar Challenger; Identification; Latitude of event; Leg73; Longitude of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sample code/label; Sediment type; South Atlantic/CANYON; South Atlantic/HILL; South Atlantic/PLATEAU; South Atlantic/RIDGE; South Atlantic/VALLEY; Substrate type; Uniform resource locator/link to image; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 385 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
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    Unknown
    Annotated record of the detailed examination of Mn deposits from DSDP Leg 74 (Holes 527, 528, 528A, 529) (1984)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: The drilling plan for Leg 74 of the Deep Sea Drilling Project was designed to address three main scientific topics: (1) the history of the deep-water circulation in the southeastern Atlantic, (2) the nature and geologic evolution of the Walvis Ridge, and (3) the biostratigraphy and magnetic stratigraphy of this region. In order to study these subjects, a suite of five sites was drilled on the Walvis Ridge that extended from its crest (near 1000 m water depth) down its northwest flank into the Angola Basin to a depth of 4400 m.
    Keywords: 74-527; 74-528; 74-528A; 74-529; Comment; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; Event label; Glomar Challenger; Identification; Leg74; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sample code/label; Sediment type; Size; South Atlantic; South Atlantic/RIDGE; South Atlantic/SLOPE; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 74 data points
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    DATA PANGAEA
  • 5
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    Annotated record of the detailed examination of Mn deposits from DSDP Leg 75 (Hole 530) (1984)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Site 530 is located in the southeastern corner of the Angola Basin, about 20 km north of the Walvis Escarpment, near the eastern end of the easternmost (or Frio) segment of the Walvis Ridge. It lies on the abyssal floor of the Angola Basin and exhibits a seismic stratigraphic sequence typical for the entire deep part of the basin. It was selected because it appears to have the oldest strata in the region preserved in a sediment pond between low basement rises.
    Keywords: 75-530; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Identification; Leg75; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sample code/label; Sediment type; South Atlantic/RIDGE; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 8 data points
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  • 6
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    Annotated record of the detailed examination of Mn deposits from DSDP Leg 77 (Holes 535, 536, 537, 538A) (1984)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: The drilling of Leg 77 is part of an overall program by the JOIDES Passive Margin Panel to study the evolution of the western North Atlantic passive margin. The history of the central North Atlantic is probably the best known of all ocean basins, but the origin and history of the neighboring Gulf of Mexico are very much uncertain. Some geologists consider it the oldest ocean basin still in existence (Paleozoic), but others doubt the existence of "true" oceanic crust under the central Gulf. The nature and origin of the transitional crust and the overlying Mesozoic sedimentary sequences in the southeastern Gulf, therefore, was the main objective of Leg 77.
    Keywords: 77-535; 77-536; 77-537; 77-538A; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; File name; Glomar Challenger; Gulf of Mexico/BASIN; Gulf of Mexico/KNOLL; Gulf of Mexico/SLOPE; Identification; Leg77; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sample code/label; Sediment type; Size; Substrate type; Uniform resource locator/link to image; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 130 data points
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    DATA PANGAEA
  • 7
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    Unknown
    Annotated record of the detailed examination of Mn deposits from DSDP Leg 77 (Holes 536, 537, 538A, 540) (1984)
    PANGAEA
    In:  Supplement to: Sliter, William V; Premoli Silva, Isabella (1984): Autochthonous and displaced (allochthonous) Cretaceous benthic foraminifers from Deep Sea Drilling Project Leg 77, Sites 535, 536, 537, 538, and 540, Gulf of Mexico. In: Buffler, R.T; Schlager, W.; et al., Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, VXXII, 593-627, https://doi.org/10.2973/dsdp.proc.77.125.1984
    Details
    Publication Date: 2023-08-28
    Description: Mesozoic benthic foraminifers, recovered from five single-bit holes drilled in the southern Gulf of Mexico on Deep Sea Drilling Project Leg 77 are rare, poorly preserved, and scattered throughout the dominantly redeposited sediments. The Mesozoic sequence at basin Sites 535 and 540 consists largely of laminated limestone with smaller amounts of skeletal limestone and pure pelagic limestone, whereas the Mesozoic sediments at basement Sites 536, 537, and 538 (Hole 538A) consist largely of oolitic-oncolitic limestone.
    Keywords: 77-536; 77-537; 77-538A; 77-540; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Gulf of Mexico; Gulf of Mexico/KNOLL; Gulf of Mexico/SLOPE; Identification; Leg77; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sample code/label; Sediment type; Size; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 105 data points
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  • 8
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    Unknown
    Annotated record of the detailed examination of Mn deposits from DSDP Leg 78 (Holes 548 and 548A) (1984)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: The principal goal of Site 543 was definition of an oceanic reference section. One of the specific objectives was to provide a physical-property profile through the undisturbed oceanplate section and thereby a basis for measuring the tectonic consolidation of any offscraped rocks of similar lithology in the area of the Tiburon and Barracuda rises which constitute prominent highs emerging from the Atlantic abyssal plain and presently intersecting the deformation front of the Barbados Ridge complex.
    Keywords: 78-543; 78-543A; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Leg78; Leg78AB; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic/CONT RISE; Position; Quantity of deposit; Sample code/label; Sediment type; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 33 data points
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  • 9
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    Annotated record of the detailed examination of Mn deposits from DSDP Leg 79 (Holes 544A and 546) (1984)
    PANGAEA
    Details
    Publication Date: 2024-01-19
    Description: Seaward of the Mazagan Escarpment and slope is a band about 50 km wide where structures interpreted as diapirs stand like columns within a pile of sediments about 5 km thick . Dredges and cores from Vema cruise 30-13 and Valdivia cruise West Africa 1979 on the slopes of the most landward of these structural highs, just 10 km from the foot of the escarpment recovered fragments of sheared granite. It was hypothesized that, if this structure were a salt diapir, it might have carried upward very old sediments, dating to the earliest stages of Atlantic evolution, in the Early Jurassic or late Triassic. DSDP Leg 79, sites 544 through 547 were closely located on the structure area.
    Keywords: 79-544A; 79-546; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Leg79; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic/PLATEAU; Position; Quantity of deposit; Sample code/label; Sediment type; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 35 data points
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  • 10
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    Annotated record of the detailed examination of Mn deposits from DSDP Leg 81 (Holes 552A, 553A, 554, 554A) (1984)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Keywords: 81-552A; 81-553A; 81-554; 81-554A; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; Device type; DRILL; Drilling/drill rig; DSDP; Event label; File name; Glomar Challenger; Identification; Leg81; North Atlantic/PLATEAU; Position; Quantity of deposit; Sample code/label; Sediment type; Size; Substrate type; Uniform resource locator/link to image; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 66 data points
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    DATA PANGAEA
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