Geological Magazine; January 2008; v. 145; no. 1;
p. 105-147; DOI: 10.1017/S0016756807003925
© Cambridge University Press (CUP)
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Figure 1. Map showing the principal Upper Triassic/Lower Jurassic tetrapod-bearing fissure deposits of the English West Country around Bristol and in South Wales. The three important groups of fissure localities are Durdham Down (in Bristol), Tytherington and Cromhall, north of Bristol; Holwell, Emborough, Windsor Hill and Batscombe in the Mendip Hills; and a west of Cardiff group including Pant-y-ffynon and Ruthin, together with those on St Bride’s palaeo-island (e.g. Pant, Duchy, Ewenny and Pontalun). The map shows the inferred latest Triassic palaeo-highs that would have formed an archipelago of small limestone islands lying in a Rhaetian sea. A UK location map is shown on Figure 2. The map also shows the locations of complete Penarth Group palynological profiles and the more limited spot sample palynomorph records. Compiled from Ordnance Survey Digimap © and the BGS 1:250 000 solid geology Bristol Channel sheet with input from Audley-Charles (1970), Tucker (1977), Kellaway & Welch (1993) and Robinson (1957a). Sources for the palynological data points are The Cross & Lavernock Point (Orbell, 1973); Brent Knoll Borehole (Warrington, 1981); Watchet and St Audries Bay (Warrington & Whittaker, 1984); Selworthy (Warrington in Edwards, 1999; Warrington et al. 1995); High Ham (Warrington, Whittaker & Scrivener, 1986); Chilcompton and Vallis Vale (Warrington, 1984); Dundry Borehole (Warrington in Kellaway & Welch, 1993); Aust (Manor Farm Quarry, pers. obs.) and Hampstead Farm Quarry, Chipping Sodbury (this paper).
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