Limits to the age of the lapstone monocline, N.S.W.-a palaeomagnetic study

Paul Bishop, Peter Hunt, P. W. Schmidt

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The age of formation of the Lapstone Monocline has been long considered to be late Pliocene/early Pleistocene (the Kosciusko Uplift) but it is now generally thought to be much older. Palaeomagnetic data from haematite-rich beds within the Hawkesbury Sandstone on and about the monocline indicate that it formed before the oldest haematite was introduced to these beds. The age of this oldest haematite is 15 ± 7 Ma. On the basis of these data, the age of the monocline is unlikely to be less than 8 Ma, probably exceeds 15 Ma, and could be older than 22 Ma.

Original languageEnglish
Pages (from-to)319-326
Number of pages8
JournalJournal of the Geological Society of Australia
Volume29
Issue number3-4
DOIs
Publication statusPublished - 1982

Keywords

  • Eastern highlands
  • Haematite
  • Hawkesbury Sandstone
  • Lapstone Monocline
  • Palaeomagnetism

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