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Proceedings 16

Summary of papers

Toghill, P. (2011). Shropshire unconformities. p.1-12.

The remarkable variety of rock within Shropshire spans 700 million years of Earth history, dominated by southern Britain’s position near to plate boundaries through most of late Precambrian and Phanerozoic time. Associated plate tectonic processes have led to significant breaks in deposition, uplift and disturbance, thereby splitting the geological sequence apart with a series of major unconformities.

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Torrens, H.S. (2011). Robert Townson (1762-1827): an all too long forgotten Salopian. p.13-24.

Townson provided the first substantive account of the geology of Shropshire within his privately published book. His contributions regarding Shropshire are explored in detail by the author through reproduction of a book chapter first published in Hungary.

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Pannett, D. (2011). Landscape evolution in central Shropshire: a simple field aid. p.25-30.

Evidence for landscape evolution in central Shropshire is contained in geological surfaces. A simple field aid is described, used to demonstrate this evolution in a manner easily absorbed by field classes.

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Liu, A.G. (2011). Reviewing the Ediacaran fossils of the Long Mynd, Shropshire. p.31-43.

The Precambrian fossils of the Long Mynd, Shropshire, are becoming increasingly important to studies of palaeoecology and evolution immediately prior to the Cambrian Explosion of animal life. Longmyndian fossils are discussed within the context of Ediacaran palaeontology, and their biological affinities are explored. Stratigraphic ranges for the taxa of the Longmyndian Supergroup are then provided, to assist in correlating the region with other global fossil localities.

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Rosenbaum, M.S. (2011). Field Meeting Report: The glacial geology of the Church Stretton Valley, led by Simon J Cook 18th June 2011. p.44-50.

The purpose of the field meeting was to introduce the variety of geological features outcropping within the Stretton Valley related to glaciation and glacier margins. The maximum extent of the late Devensian Ice Sheet brought glaciers into the Church Stretton Valley which have left excellent examples of deglacial and ice sheet stagnation terrain. Current questions concerning the glaciation relate to its extent within the Valley and its provenance, whether from the north, as part of the British-Irish Ice Sheet, or locally generated from snowfields up on the Longmynd, or even from the west, with Welsh Ice over-riding the plateau.

Even so, the considerable size of the Stretton Valley suggests that glacial erosion by any of the possible contenders alone is unlikely, and that either extensive erosion developed as a result of meltwater pouring from the glaciers or else river action prior to glaciation was in part responsible, possibly assisted by a much earlier (?Anglian) glaciation. However, the age of the V-shaped valley, although suggesting river erosion, may actually be much older still since Lower Palaeozoic sedimentary rocks mantle the Precambrian on the western side.

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Langford, J.I. (2011). Granite Millstones of Shropshire and Adjoining Counties. p.51-59.

Granite millstones in Shropshire and adjoining counties occur in a region about 20 miles wide that extends from Clun in the west to Sutton Coldfield in the east. Differences in profile and other features suggest a large spread in age. On the other hand, their composition and texture, at least visually, are remarkably similar, implying a common source for the material from which they were manufactured. So what was their origin, when and why were they produced and where were they used? In this survey of granite millstones in the West Midlands their composition and source are considered in some detail and the other points are discussed briefly.

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Rosenbaum, M.S. & Ray, D.C. (2011). Conference Report: Siluria Revisited, 10th to 15th July 2011. p.60-62.

The purpose of this conference for the International Subcommission on Silurian Stratigraphy was to facilitate presentations of recent research concerning the Silurian System. The Silurian has recently been the focus of a considerable amount of research interest encompassing climate change, extinction and radiation events, isotope excursions, hydrocarbon source rock generation and much more, all of which need to be underpinned by detailed stratigraphical, sedimentological, geochemical and palaeontological studies and accurate radiometric dating. The field trips were intended to enable a new generation of workers on the Silurian System to visit the GSSPs for those series and stage boundaries that occur in Wales and the Welsh Borders and to visit other sites that have been the subject of recent published and unpublished study.

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Complete volume, p.1-39

All papers
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To cite an article from this publication:
Torrens, H.S. (2011). Robert Townson (1762-1827): an all too long forgotten Salopian. Proceedings of the Shropshire Geological Society16, 13-24. ISSN 1750-855X (Print), ISSN 1750-8568 (Online) [Online at www.shropshiregeology.org.uk/Proceedings; printed copy in press]

© 2011 Shropshire Geological Society

Proceedings No.16 2011