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Preliminary interpretation of upper crustal structure across the Midland Valley of Scotland from two East–West seismic refraction profiles

A. CONWAY, M. C. DENTITH, J. J. DOODY and J. HALL
Journal of the Geological Society, 144, 865-870, 1 November 1987, https://doi.org/10.1144/gsjgs.144.6.0865
A. CONWAY
Department of Geology, University of Glasgow, Glasgow G12 8QQ, UK
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M. C. DENTITH
Department of Geology, University of Glasgow, Glasgow G12 8QQ, UK
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J. J. DOODY
Department of Geology, University of Glasgow, Glasgow G12 8QQ, UK
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J. HALL
Department of Geology, University of Glasgow, Glasgow G12 8QQ, UK
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Abstract

A seismic refraction survey was carried out over the Central Coalfield Syncline in the Midland Valley of Scotland during May 1984, to determine depth to sub-Carboniferous basement and to locate intra-basement contrasts and structure. Three refractors were identified and mapped. The shallowest is thought to be the top of the Lower Old Red Sandstone, so that the top layer of the crustal model defines the Carboniferous and Upper Old Red Sandstone which varies in thickness from 1.5 to 3.5 km. Deeper refractors are interpreted as the top of the crystalline basement and an intra-basement horizon. The depth of the top basement refractor limits the combined thickness of Lower Old Red Sandstone and Lower Palaeozoic sedimentary rocks to between 0 and 5 km. No obvious correlations with the Bathgate gravity and magnetic anomaly are found in the seismic data. Gravity modelling based on the seismic interpretation suggests that the likeliest cause of the anomaly is thick extrusive basic igneous rocks of Carboniferous and/or Lower Old Red Sandstone age.

  • © Geological Society of London 1987

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Journal of the Geological Society: 144 (6)
Journal of the Geological Society
Volume 144, Issue 6
November 1987
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Preliminary interpretation of upper crustal structure across the Midland Valley of Scotland from two East–West seismic refraction profiles

A. CONWAY, M. C. DENTITH, J. J. DOODY and J. HALL
Journal of the Geological Society, 144, 865-870, 1 November 1987, https://doi.org/10.1144/gsjgs.144.6.0865
A. CONWAY
Department of Geology, University of Glasgow, Glasgow G12 8QQ, UK
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M. C. DENTITH
Department of Geology, University of Glasgow, Glasgow G12 8QQ, UK
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J. J. DOODY
Department of Geology, University of Glasgow, Glasgow G12 8QQ, UK
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J. HALL
Department of Geology, University of Glasgow, Glasgow G12 8QQ, UK
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Preliminary interpretation of upper crustal structure across the Midland Valley of Scotland from two East–West seismic refraction profiles

A. CONWAY, M. C. DENTITH, J. J. DOODY and J. HALL
Journal of the Geological Society, 144, 865-870, 1 November 1987, https://doi.org/10.1144/gsjgs.144.6.0865
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