Late Cretaceous extinction patterns in Antarctica

J. Alistair Crame, SA Lomas, D Pirrie, A Luther

Research output: Contribution to journalArticlepeer-review

Abstract

New correlations of marine elastic sedimentary rocks exposed within the James Boss Basin, Antarctica have shown that the mid- to late Cretaceous succession is in excess of 5 km thick. Plotting the ranges of the principal molluscan macrofossils against the revised stratigraphy indicates that inoceramid bivalves are totally absent, and dimitobelid belemnites extremely rare, throughout an extensive 1400 m thick Maastrichtian succession, These early extinction patterns are interpreted to be due to both a regional shallowing event and a pronounced phase of high-latitude, Campanian-Maastrichtian cooling. Cool polar bottom waters may have been forming by as early as mid- to late Campanian times.

Original languageEnglish
Pages (from-to)503-506
Number of pages4
JournalJournal of the geological society
Volume153
DOIs
Publication statusPublished - Jul 1996

Keywords

  • Antarctica
  • K-T boundary
  • Inoceramidae
  • belemnites
  • extinction
  • JAMES-ROSS-ISLAND
  • PENINSULA REGION
  • STRATIGRAPHY

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