About This Item
- Full text of this item is not available.
- Abstract PDFAbstract PDF(no subscription required)
Share This Item
The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
Volume:
Issue:
First Page:
Last Page:
Title:
Author(s):
Article Type:
Abstract:
Surface-sediment maps, just completed, are the first depiction of sea-floor sediment distributions on a systematic and uniform scheme for the entire Pacific basin. Ten dominant sediment types are mapped, using a classification based on calcareous-biosiliceous biogenic components and conventional textural categories for nonbiogenic components (gravel/sand/silt/clay); three minor sediment types distinguish volcanic and organic-skeletal gravels/sands/silts. Primary data were from more than 4,000 Pacific Ocean cores in the Lamont-Doherty Geological Observatory collection. Qualitative smear-slid analyses were done on these cores, using petrographic microscopes combined with laboratory determinations of CaCO3 for quantitative control; many additional data were taken rom unpublished smear-slide descriptions, the World Data Bank, and published information on sea-floor deposits. The maps depict unconsolidated sediments exposed on the ocean floor, presumably at the sediment-water interface, recovered by coring and do not necessarily represent Holocene material. Additional maps showing details of sediment types and the enormous data base, with an explanation of sea-floor sampling techniques and core samples of all 13 sediment types are also available for viewing.
End_of_Article - Last_Page 976------------