Bate (1978, p. 254) commented of the Great Estuarine Group succession from the Inner Hebrides, Scotland (Fig. 1) that it ‘is so imperfectly known with respect to its ostracod fauna that it is one area in urgent need of investigation’. This was rectified by Wakefield (1991, 1994) in which the largest freshwater and brackish water ostracod fauna from the British Bathonian was described, particularly with respect to the number of darwinulid and lim-nocytherid species. However, the similarity with freshwater and brackish water ostracod assemblages recorded in the English Midlands, although generically high, was specifically low. Studies recording freshwater and brackish water ostracods from the English Midlands, and therefore of com-parative interest, are those of Bate (1965, 1967), Ware (1978), Stephens (1980), Ware & Whatley (1980), Ware & Windle (1981), Jacovides (1982), Timberlake (1982), Barrington (1986), and Stride (1994). Figure 2 illustrates the stratigraphical coverage of these studies and their overlap with the Great Estuarine Group succession. The development of such brackish water ostracod faunas during the Bathonian was discussed in Whatley (1990).
Lithostratigraphical correlation of Bathonian strata from the English Midlands highlighting successions from which freshwater and brackish-water ostracods have been analysed. The lithostratigraphy of the Great Estuarine Group, Inner Hebrides, Scotland, is also shown to enable an approximate correlation with the English successions. English stratigraphy after Bradshaw (1978), Torrens (1980b), Boneham & Wyatt (1993),
Figures & Tables
This book charts the stratigraphical distribution of ostracods in the Cambrian to Pleistocene deposits of Britain and outlines their utility for dating and correlating rock sequences, as well as indicating aspects of their palaeoenvironmental and palaeogeographical significance. These small bivalved crustaceans are the most abundant arthropods in the fossil record. Indeed, the stratigraphy of Britain, which embraces many type-sequences, provides a particularly rich and full record of them, from at least the basal Ordovician, and from the British Cambrian there is a biostratigraphy based on their ‘relatives’, the bradoriids and phosphatocopids. Ostracod distributions demonstrate the ecological success story of the group, occupying as they do marine, non-marine and even ‘terrestrial’ habitats. Written by current specialists in the field, this book is an authoritative account and will be welcomed by all micropalaeontologists and applied geologists in the industrial and academic world alike. It is richly illustrated with over 80 plates of electron micrographs and specially drawn maps, diagrams and range-charts.