de.pangaea.dataset802673 und dataset PANGAEA

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https://www.pangaea.de/ information pointOfContact 2026-06-15T18:56:23Z https://doi.pangaea.de/10.1594/PANGAEA.802673 1985-01-01 publication https://doi.org/10.1594/PANGAEA.802673 Krissek, Lawrence A

krissek.1@osu.edu

https://orcid.org/0009-0002-1596-0699 information author Morley, Joseph J author Lofland, Darlene K author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital Supplement to: Krissek, Lawrence A; Morley, Joseph J; Lofland, Darlene K (1985): The occurrence, abundance, and composition of ice-rafted debris in sediments from Deep Sea Drilling Project Sites 579 and 580, Northwest Pacific. In: Heath GR; Burckle LH; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 86, 647-655, https://doi.org/10.2973/dsdp.proc.86.128.1985 The abundance and composition of the coarse-sand fraction (250 µm-2 mm) of samples from Deep Sea Drilling Project Sites 579 and 580 were investigated to determine the chronology of ice rafting at these locations. The ice-rafting signal at these sites is reduced relative to the generalized ice-rafting chronology of the North Pacific (Kent et al., 1971) because of increased distance to the ice-rafting source areas. These data, however, do record the general increase in ice-rafting importance as sediment age decreases, especially between 0 and 1.0 m.y. ago. In addition, peaks in ice-rafting importance since 1.0 m.y. ago at Sites 579 and 580 are generally synchronous with periods of major ice-rafting influence throughout the North Pacific. The first occurrence of ice-rafted debris at the Matuyama/Gauss magnetic boundary supports a proposed age of approximately 2.47 m.y. for the onset of major Northern Hemisphere glaciation. The coarse-sand fraction at Sites 579 and 580 contains a significant component of non-ice-rafted material, particularly biogenic particles and volcanic pumice. Under these conditions, the standard assumption that the weight percent of the coarse-sand fraction reflects variations in ice-rafting importance may not be valid. For samples taken at some distance from the source of ice-rafted debris, both the abundance and the composition of the coarse-sand fraction must be considered to obtain a valid measure of the influence of sediment transport via ice rafting. completed Krissek, Lawrence A

krissek.1@osu.edu

https://orcid.org/0009-0002-1596-0699 information principalInvestigator DSDP Deep Sea Drilling Project theme 1995-01-01 creation PANGAEA

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https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation 153.8362 153.9763 38.6268 41.6245 1982-06-01T00:00:00 1982-06-06T00:00:00 0.14 152.87 Event label thematicClassification Sample code/label thematicClassification DSDP/ODP/IODP sample designation DEPTH, sediment/rock physicalMeasurement mbsf m m AGE physicalMeasurement ka BP ka BP Size fraction 2.000-0.250 mm physicalMeasurement Wet sieving % % Ice rafted debris physicalMeasurement Counting 250-2000 µm fraction % % Volcanic components physicalMeasurement Counting 250-2000 µm fraction % % Biogenic particles physicalMeasurement Counting 250-2000 µm fraction % % text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.802673?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: 86-579 * LATITUDE: 38.628000 * LONGITUDE: 153.836200 * DATE/TIME: 1982-06-01T00:00:00 * ELEVATION: -5737.0 m * PENETRATION: 18.9 m * RECOVERY: 17.1 m * LOCATION: North Pacific Ocean * CAMPAIGN: Leg86 * BASIS: Glomar Challenger * METHOD/DEVICE: Drilling/drill rig 2 cores; 17.9 m cored; 0 m drilled; 95.3 % recovery 1982-06-01T00:00:00 EVENT LABEL: 86-579A * LATITUDE: 38.626800 * LONGITUDE: 153.838000 * DATE/TIME: 1982-06-01T00:00:00 * ELEVATION: -5737.0 m * PENETRATION: 149.5 m * RECOVERY: 116.2 m * LOCATION: North Pacific Ocean * CAMPAIGN: Leg86 * BASIS: Glomar Challenger * METHOD/DEVICE: Drilling/drill rig 15 cores; 135.5 m cored; 0 m drilled; 85.7 % recovery 1982-06-01T00:00:00 EVENT LABEL: 86-580 * LATITUDE: 41.624500 * LONGITUDE: 153.976300 * DATE/TIME: 1982-06-06T00:00:00 * ELEVATION: -5375.0 m * PENETRATION: 155.3 m * RECOVERY: 140.4 m * LOCATION: North Pacific Ocean * CAMPAIGN: Leg86 * BASIS: Glomar Challenger * METHOD/DEVICE: Drilling/drill rig 17 cores; 155.3 m cored; 0 m drilled; 90.4 % recovery 1982-06-06T00:00:00