. Conodonts of the Lower Border group and equivalent strata (lower carboniferous) in Northern Cumbria and the Scottish Borders, Conodonts; Paleontology; Paleontology; Conodonts; Paleontology. TEXT-FIG. 2. Outcrop of the Lower Border and Cementstone groups in the Northumberland basin, and equivalent strata in the Solway basin, showing localities and geographic subdivisions used in the text. For locality details see Appendix I. pers. obs.). These strata were probably deposited in a shallow open marine or slightly restricted subtidal environment. The Gillfoot Formation is dominantly compose
. Conodonts of the Lower Border group and equivalent strata (lower carboniferous) in Northern Cumbria and the Scottish Borders, Conodonts; Paleontology; Paleontology; Conodonts; Paleontology. TEXT-FIG. 2. Outcrop of the Lower Border and Cementstone groups in the Northumberland basin, and equivalent strata in the Solway basin, showing localities and geographic subdivisions used in the text. For locality details see Appendix I. pers. obs.). These strata were probably deposited in a shallow open marine or slightly restricted subtidal environment. The Gillfoot Formation is dominantly composed of reddish-brown conglomerates and sandstones (Craig, 1956). Occasional thin limestones and some of the sandstone beds contain a fauna that includes brachiopods and corals (Craig, 1956; pers. obs.). The depositional environment was, therefore, at least periodically marine. In the Rerrick outlier, the Wall Hill Sandstone and Orroland groups together represent the approximate lateral equivalents of the Lower Border Group (Deegan, 1973). The Wall Hill Sandstone Group is 360 m thick and comprises the White Port, Sheep Bught, and Abbey Head formations, each composed of different proportions of conglomerates, sandstones, siltstones, and shales (Deegan, 1973). These strata were deposited in a variety of fluvial environments (Deegan, 1973) and have not been sampled for conodonts. Strata of the Orroland Group reflect deposition under a range of dominantly fluvial and alluvial conditions. Of the seven formations of the group (see Deegan, 1973), only the Barlacco Heugh and Orroland Lodge formations contain marginal marine strata. CONODONT FAUNA Previous work on British Dinantian conodonts was reviewed by Varker and Sevastopulo (1985). Few studies have dealt with shallow-shelf conodont faunas of Dinan- tian age; Rhodes, Austin, and Druce (1969) is the most recent major systematic work to do so. Since that publica- tion, there has been a major shift away from traditional "form taxono
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