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Geophysical down‐hole recognition of the Lower Devonian ‘Psammosteus’ Limestone and Townsend Tuff Bed, South Wales
Author(s) -
Tunbridge I. P.
Publication year - 1983
Publication title -
geological journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 54
eISSN - 1099-1034
pISSN - 0072-1050
DOI - 10.1002/gj.3350180405
Subject(s) - devonian , geology , borehole , structural basin , townsend , margin (machine learning) , paleontology , geochemistry , geomorphology , physics , quantum mechanics , machine learning , computer science
Abstract Geophysical down‐hole logs from the Maesteg and Senghenydd boreholes permit the recognition of the Townsend Tuff Bed and ‘Psammosteus’ Limestone markers on the basis of distinctive log motifs. The thickness of the interval between these markers is greater than at basin‐margin localities and may be an indication of rapid deposition in the centre of the Anglo‐Welsh basin in Lower Devonian times.