Magnetic and calcareous-nannofossil stratigraphy of the lower Palaeogene formations of the Hampshire and London basins ( UK).

M. P. Aubry, E. A. Hailwood, H. A. Townsend

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Abstract

A magnetostratigraphic study of the lower Palaeogene formations exposed in the Hampshire and London basins, southern UK, has led to the identification of eight stratigraphically distinct normal polarity magnetozones within an otherwise reverse polarity sedimentary sequence which spans the Late Palaeocene to Middle Eocene. A complementary study of the calcareous nannofossil biostratigraphy of these sections, and related sections elsewhere in NW Europe, allows a correlation of this succession of normal polarity magnetozones with the biostratigraphically-calibrated geomagnetic polarity timescale, based on marine magnetic anomalies. Anomalies 22 and 25 appear not to be represented in the UK lower Palaeogene succession because of major unconformities at the Early/Middle Eocene boundary (within the Wittering Division of the Bracklesham Group) and within the Late Palaeocene respectively. The former appears to correlate with a widespread erosional event in the oceans identified from seismic records and interpreted as reflecting a major eustatic sea level fall.-from Authors

Original languageEnglish (US)
Pages (from-to)729-735
Number of pages7
JournalJournal - Geological Society (London)
Volume143
Issue number5
StatePublished - 1986
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geology

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