. Bulletin of the British Museum (Natural History), Geology. BRACHIOPODS OF DUNCANNON GROUP OF SE IRELAND 123. Fig. 12 Locality map of the Ballinatray locality. Key as in Fig. 2. stone Formation (Rawtheyan) and the well known Hirnantia fauna in the topmost mudstones. A review of this inlier is given by Parkes & Palmer (1994). The stratigraphy of the eastern Ireland successions in the Iapetus suture zone has been investigated by Murphy (1987), who identified two separate terranes, the Grangegeeth and Bellewstown ter- ranes, between the Balbriggan-Herbertstown sector of the Leinster terrane
. Bulletin of the British Museum (Natural History), Geology. BRACHIOPODS OF DUNCANNON GROUP OF SE IRELAND 123. Fig. 12 Locality map of the Ballinatray locality. Key as in Fig. 2. stone Formation (Rawtheyan) and the well known Hirnantia fauna in the topmost mudstones. A review of this inlier is given by Parkes & Palmer (1994). The stratigraphy of the eastern Ireland successions in the Iapetus suture zone has been investigated by Murphy (1987), who identified two separate terranes, the Grangegeeth and Bellewstown ter- ranes, between the Balbriggan-Herbertstown sector of the Leinster terrane and the Central terrane (equivalent of the Southern Uplands of Scotland). These terranes are identified on the basis of contrasting volcanic characteristics and strati- graphical sequences as well as faunal differences. Murphy (1987) also correlated the sequences of eastern Ireland with those of the Leinster terrane and the Lake District of England. Within the Leinster terrane, recent detailed reviews of the complete stratigraphical successions have been by Williams et al. (1972), Briick et al. (1978, 1979), and Holland (1981). More recently Harper & Parkes (1989) summarized the palaeontological constraintson the development of Irish Cale- donide terranes, a subject expanded upon in Murphy et al. (1991). Parkes & Vaughan (1992) and Owen et al. (1992) have dealt specifically with the Grangegeeth terrane. Tietzsch-Tyler (1989) has completed a re-evaluation of the Lower Palaeozoic geology, as well as the preparation of , compilation maps, for south-east Ireland. This latter work involves numerous modifications which are outside the scope of the present work, but several redefined formations are used in the Duncannon Group, as explained in the key to those maps. Principal of these is the Annestown Formation, !of essentially rhyolitic composition with andesite, slate and i limestone members. This represents undifferentiated middle ; Duncannon Group sediments and volcan
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