Letter | Published:

Age of the New Red Sandstone in South Devonshire

Naturevolume 207pages624625 (1965) | Download Citation

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Abstract

RADIOMETRIC dating of the Exeter Volcanic Series (the Exeter Traps) recently gave ages of 279 ± 6 m.y. and 281 ± 11 m.y. for the Killerton mica-lamprophyre (minette)1 and the Dunchideock basalt2 respectively. These and other extruded masses of the Series are interbedded with breccias and sandstones of the New Red Sandstone both north and south of Exeter, and as far west as Hatherleigh; new evidence is thus provided of the age of the strata. The main intrusive event of the Dartmoor granite is dated at 295 m.y. (ref. 3), the paroxysmal phase of the Variscan Orogeny being regarded as preceding this by only a short time4. Smith5 puts the Permo-Carboniferous boundary at 280 m.y.

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Affiliations

  1. Sedimentology Research Laboratory, University of Reading

    • D. J. C. LAMING
  2. Department of Geology, University of New Brunswick, Fredericton, Canada

    • D. J. C. LAMING

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https://doi.org/10.1038/207624a0

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