By C.J. Cleal, B.A. Thomas

This quantity summarizes the result of a survey of British higher Carboniferous websites, undertaken among 1978 and 1990 as a part of the Geological Conservation evaluation (GCR). The GCR used to be the 1st try to verify the clinical importance of all Britain's geological websites and has proved a landmark within the improvement of a coherent geological conservation procedure during this nation. to make sure that the exams have been according to a company logical and medical starting place, the diversity of medical curiosity used to be divided into ninety-seven discrete topic 'blocks', reflecting the average divisions of stratigraphy, palaeogeography and geological method; Westphalian stratigraphy and Namurian stratigraphy have been of those blocks. the 1st level within the survey was once a evaluation of the literature, to set up a compre­ hensive database of websites. From this, a provisional record of doubtless major websites used to be made and this used to be circulated to all suitable experts during this nation and in another country. even as, the websites have been visited to evaluate their actual situation and no matter if the curiosity used to be nonetheless extant. sometimes, excavation (so-called 'site-cleaning') used to be performed to work out if the curiosity of a website can be resurrected or better. The com­ ments made by way of the experts and the sphere observations have been then used to provide a moment web site record, which back was once circulated for comment.

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1978). ~ j I: Conodonts Owens et al. (1985) and Riley et al. (1985) list a number of species from this exposure of the Aegiranum Marine Band, belonging to the genera Idiognatboides, Declinognathodus, Hindeodella and Ligonodina. Of interest is the presence of Neognatbodus kanumai (Igo) , previously described from beds thought to be equivalent to the lower Westphalian of Japan. Otherwise, however, the rest of the assemblage consists of elements described by Higgins (1975) from lower stratigraphical levels in Britain.

Ramsbottom (1969b) was initially unable to identify the Vallites eostriolatus Subzone here, but Riley, Owens and Swann (in Ramsbottom, 1981) subsequently recognized it in their Bed D. , ... " ... , ... , ... ... ,- ... , M ... , ... ... ,- c.. , ... , ... ... M ... 0 :;( Prereticulatus Marine Band -... ... ~ ... ... 1'1 ~ ... ~ ... , ... ... ~ 1 .. 5 Log of part of the section at River Darwen straddling the Alportian-Kinderscoutian boundary. Based on Ramsbottom (1981, pp. 8). , 1967), but they are generally small and incomplete.

Palaeocurrents suggest that the turbiditic infill of the Culm Trough was derived from somewhere in the present-day Bristol Channel. Owen (1971e), Kelling (1974) and Cope and Bassett (1987) have postulated a landmass there (named 'Sabrina' by Kelling), supplying sediment to both the Culm Trough and the South Wales basin. g. Higgs, 1986). However, Kelling (1974) has argued that the Bristol Channel landmass was significantly larger than is indicated by the present distance between Devon and South Wales, and that it was subject to considerable crustal shortening, indicated by major Variscan folds and thrusts.

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