Bibliography - Jonathan D. Radley
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A Wealden guide I: the Weald Sub-basin, by Jonathan D. Radley, published May 2006 in Geology Today (vol. 22, issue 3, article, pp.109-118)   View Online

The Wealden strata of southern England provide a range of evidence for Early Cretaceous non-marine environments and their inhabitants, and a climate of warm to hot, 'Mediterranean' aspect. Because of its exposure, and its range of facies, distinguishing a variety of sedimentary environments, the Wealden has long fascinated geologists intent on providing an environmental model. This article is one of two intended to give an overview of Wealden environments, providing the geological framework of these strata. In this article, the type-succession in the Weald Sub-basin of south-east England is summarized and briefly interpreted.

A Wealden guide II: the Weald Sub-basin, by Jonathan D. Radley, published 19 September 2006 in Geology Today (vol. 22, issue 5, article, pp.187-193)   View Online

Part 1 of 'A Wealden guide' (Geology Today, 2006, v.22, n.3) provided an introduction to the non-marine Early Cretaceous Wealden strata of southern England, and an account of the succession that outcrops within the Weald Sub-basin. This second article focuses on the Wealden of the Wessex Sub-basin, exposed on the Isle of Wight and Dorset coasts of southern and south-west England.

The non-marine Lower Cretaceous Wealden strata of southern England, by Jonathan D. Radley and Percival Allen, published 2012 in The Proceedings of the Geologists' Association London (no. 123 issue 2, article, pp.235-244)   View Online

The non-marine Lower Cretaceous Wealden strata of the Wessex-Weald Basin (southern England) are introduced, with reference to the depositional model developed by Professor Percival Allen FRS (Allen, 1975). To demonstrate this model and the development of Wealden palaeoenvironments through time, Wealden sites have been selected for the Geological Conservation Review programme. Site selection rationale is briefly outlined.

The Wealden (non-marine Lower Cretaceous) of the Weald Sub-basin, southern England, by Jonathan D. Radley and Percival Allen, published 2012 in The Proceedings of the Geologists' Association London (no. 123 issue 2, article, pp.245-318)   View Online

The Wealden strata (non-marine Lower Cretaceous) of the Weald Sub-basin outcrop in the Weald district of south-east England; the Wealden type-area. The succession is made up of the mixed alluvial-lacustrine-lagoonal Hastings Beds Group below and the predominantly lacustrine-lagoonal Weald Clay Group above. Deposition was strongly influenced by tectonism amongst surrounding massifs, and the warm to hot, periodically wet Wealden climate. Geological Conservation Review sites within the Weald district are dominated by inland sites, but also include extensive coastal cliff and foreshore exposures near Hastings, East Sussex. The Wealden strata have been documented and interpreted since the earliest days of geological enquiry in Great Britain. Collectively, the selected sites demonstrate the key elements of a depositional model for the Wealden of the Weald, developed and published by Professor Percival Allen FRS (1917-2008) in these Proceedings (Allen, 1975). The sites are documented and interpreted, with special reference to research history, chronostratigraphy, structural context, palaeoenvironments, palaeobiology and palaeoclimatology. New directions for research are proposed, as applicable.

Percival Allen FRS and the Wealden of southern England, by Jonathan D. Radley, published 18 October 2014 in Biological Journal of the Linnean Society (vol. 113, issue 3, article, pp.677-693)   View Online

Percival ('Perce') Allen's lifelong research into Wealden sedimentology and palaeoenvironments (published 1938-2012) is summarized. His initial investigations, principally into the lower Wealden Hastings Group, led to publication of a deltaic model in 1959 involving eustatically controlled lithofacies architecture. This model was eventually replaced by a revised version in which alluvial fan construction was linked to uplift of source massifs. Today, the revised model and its subsequent refinements form the basis of southern English Wealden palaeoenvironmental interpretation, applicable to both the Weald and Wessex sub-basins in southern England. In later years, Percival Allen took a leading role in Wealden geoconservation, identifying and documenting Geological Conservation Review sites as vouchers for Wealden stratigraphy, palaeobiology, sedimentary processes and palaeoenvironments. A previously unpublished report written by Percival Allen is presented: an account of an excursion to Philpots Quarry, West Sussex, south-east England