Site 647 ( ODP).

S. P. Srivastava, M. A. Arthur

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Rotary and APC cores provide a nearly complete sequence over the last 2.5 m.y. of deposition (late Pliocene-Pleistocene). Recognizable alternations of relatively nannofossil-rich silty clay and more gravel-rich, silty intervals appear to represent depositional cycles related to glacial-interglacial climatic changes. Sedimentation rates average about 46 m/m.y. (4.6 cm/k.y.) . Sediment deposited over the last 1.2 m.y. contains more silt, sand, and detrital carbonate than the older part of Lithologic Unit I. A suite of ice-rafted pebbles could have been derived from a broad region, including carbonate terrains in the northern Baffin Bay area. As at Site 646, the onset of glacial ice rafting occurred at about 2.5 Ma.-from Authors

Original languageEnglish (US)
Pages (from-to)675-905
Number of pages231
JournalUnknown Journal
StatePublished - Jan 1 1987

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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