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Upper Triassic and Lower Jurassic stratigraphy from exploration well L134/5-1, offshore Inner Hebrides, west Scotland

Lookup NU author(s): Dr Ian Boomer

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Abstract

A thick (c. 1368 m) Upper Triassic to Lower Jurassic sedimentary sequence from exploration well L134/5-1, offshore Inner Hebrides, has yielded a rich and diverse foraminiferal and ostracod microfauna. Many of the taxa have been previously described throughout northwest Europe. Poor preservation (often due to crushing and/or overgrowth) and low numbers preclude a complete taxonomic review of this material, although changes in the faunal composition, rates of faunal turnover and palaeoenvironmental analyses are discussed. This is the first published account of ostracod and foraminiferal assemblages from the Sea of Hebrides and they indicate that the sediments (argillaceous, arenaceous and carbonates) were deposited in a shelf-marine setting with environmental fluctuations that are possibly the result of local relative sea-level changes.

Publication metadata

Author(s): Ainsworth NR, Boomer I

Publication type: Article

Publication status: Published

Journal: Journal of Micropalaeontology

Year: 2001

Volume: 20

Issue: 2

Pages: 155-168

ISSN (print): 0262-821X

ISSN (electronic): 2041-4978

Publisher: Geological Society Publishing House

URL: http://dx.doi.org/10.1144/jm.20.2.155

DOI: 10.1144/jm.20.2.155

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