Coarse-sand ice-rafted debris components and mass accumulation rates of ODP Site 152-918, supplement to: St. John, Kristen E Kudless (1999): Data Report: Site 918 IRD mass accumulation rate record, late Miocene-Pleistocene. In: Larsen, HC; Duncan, RA; Allan, JF; Brooks, K (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 163, 1-4

To understand the late Cenozoic glacial history of the Northern Hemisphere, continuous long-term proxy records from climatically sensitive regions must be examined. Ice-rafted debris (IRD) from Ocean Drilling Program (ODP) Site 918, located in the Irminger Basin, is one such record. IRD in marine se...

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Bibliographic Details
Main Author: St. John, Kristen E Kudless
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 1999
Subjects:
Ocean Drilling Program ODP
Greenland
Irminger Basin
Online Access:https://dx.doi.org/10.1594/pangaea.804839
https://doi.pangaea.de/10.1594/PANGAEA.804839
Description
Summary:To understand the late Cenozoic glacial history of the Northern Hemisphere, continuous long-term proxy records from climatically sensitive regions must be examined. Ice-rafted debris (IRD) from Ocean Drilling Program (ODP) Site 918, located in the Irminger Basin, is one such record. IRD in marine sediments is a direct indicator of the presence of glacial ice extending to sea level on adjacent landmasses, and, therefore, is an important paleoclimatic signal from the mid- to high latitudes. The IRD record at Site 918 is the first long-term ice-rafting record available for southeast Greenland, a region that may have been a key nucleation area for widespread glaciation during the late Cenozoic (Larsen et al, 1994, doi:10.2973/odp.proc.ir.152.1994). This data report presents the results of coarse sand-size IRD mass accumulation rate (MAR) analyses for Site 918 from the late Miocene through the Pleistocene. In addition, a preliminary analysis of IRD compositions is included. Detailed discussions of the local, regional, and global paleoclimatic implications of this data, and of the companion Site 919 Pleistocene IRD MAR data (Krissek, 1999, doi:10.2973/odp.proc.sr.163.118.1999), are in preparation. Such future work will include comparisons of these IRD MAR data sets to the Site 919 oxygen isotope stratigraphy developed by Flower (1998, doi:10.2973/odp.proc.sr.152.219.1998).

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