Krissek Lawrence A krissek.1@osu.edu 0009-0002-1596-0699 Morley Joseph J Lofland Darlene K 1985 (Appendix) Coarse-sand fraction abundance and composition at DSDP Site 86-579 and Hole 86-580 dataset https://doi.org/10.1594/PANGAEA.802673 Krissek Lawrence A krissek.1@osu.edu 0009-0002-1596-0699 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 book chapter In: Heath GR; Burckle LH; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office) 86 https://doi.org/10.2973/dsdp.proc.86.128.1985 647-655 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. 153.8362 153.9763 38.6268 41.6245 153.8835 39.62643333333333 1982-06-01T00:00:00 1982-06-06T00:00:00 0.14 152.87 DSDP Deep Sea Drilling Project https://www.deepseadrilling.org/ Deep Sea Drilling Project DSDP 86-579 38.628 153.8362 North Pacific Ocean -5737.0 1982-06-01T00:00:00 Leg86 Leg86 1982-05-15T00:00:00 1982-05-15 1982-06-14T00:00:00 1982-06-14 Glomar Challenger https://www-odp.tamu.edu:443/glomar.html Heath, G Ross Heath, G Ross Burckle, Lloyd H Burckle, Lloyd H doi:10.2973/dsdp.proc.86.1985 Glomar Challenger https://www-odp.tamu.edu:443/glomar.html Drilling/drill rig DRILL 18.9 m 17.1 m 2 cores; 17.9 m cored; 0 m drilled; 95.3 % recovery 86-579A 38.6268 153.838 North Pacific Ocean -5737.0 1982-06-01T00:00:00 Leg86 Leg86 1982-05-15T00:00:00 1982-05-15 1982-06-14T00:00:00 1982-06-14 Glomar Challenger https://www-odp.tamu.edu:443/glomar.html Heath, G Ross Heath, G Ross Burckle, Lloyd H Burckle, Lloyd H doi:10.2973/dsdp.proc.86.1985 Glomar Challenger https://www-odp.tamu.edu:443/glomar.html Drilling/drill rig DRILL 149.5 m 116.2 m 15 cores; 135.5 m cored; 0 m drilled; 85.7 % recovery 86-580 41.6245 153.9763 North Pacific Ocean -5375.0 1982-06-06T00:00:00 Leg86 Leg86 1982-05-15T00:00:00 1982-05-15 1982-06-14T00:00:00 1982-06-14 Glomar Challenger https://www-odp.tamu.edu:443/glomar.html Heath, G Ross Heath, G Ross Burckle, Lloyd H Burckle, Lloyd H doi:10.2973/dsdp.proc.86.1985 Glomar Challenger https://www-odp.tamu.edu:443/glomar.html Drilling/drill rig DRILL 155.3 m 140.4 m 17 cores; 155.3 m cored; 0 m drilled; 90.4 % recovery 1227 CC-BY-3.0 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Event label Event Event Sample code/label Sample label DSDP/ODP/IODP sample designation hdl:10013/epic.27914.d001 Krissek Lawrence A krissek.1@osu.edu 0009-0002-1596-0699 Sample label DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length mbsf Depth sed [m] AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Age [ka BP] Size fraction 2.000-0.250 mm 2000-250 µm % size http://purl.obolibrary.org/obo/PATO_0000117 Fraction Dimensionless Ratio ψ Wet sieving Krissek Lawrence A krissek.1@osu.edu 0009-0002-1596-0699 2000-250 µm [%] Ice rafted debris IRD % Dimensionless Ratio ψ Counting 250-2000 µm fraction Krissek Lawrence A krissek.1@osu.edu 0009-0002-1596-0699 IRD [%] Volcanic components Volcanic % Dimensionless Ratio ψ Counting 250-2000 µm fraction Krissek Lawrence A krissek.1@osu.edu 0009-0002-1596-0699 Volcanic [%] Biogenic particles Biog % Dimensionless Ratio ψ Counting 250-2000 µm fraction Krissek Lawrence A krissek.1@osu.edu 0009-0002-1596-0699 Biog [%] supplement citable author43587 author755 author948 basis12 campaign208 campaign3374952 event12938 event12939 event12940 geocode1 geocode1599 geocode1600 geocode1601 geocode2205 geocode500000 geocode8128 inst41 license101 method10974 method5059 method7389 method742 param18830 param396 param5287 param790 param88543 pi948 project4 ref38088 term1073131 term1073135 term1073204 term23838 term38263 term41056 term43794 term43863 term43975 term44034