dalradian

plural dalradians · alternative Dalradian

1. geographyA series of metamorphic rocks that are difficult to assign a position in the local stratigraphical sequence

plural Dalradians

1. alternativeAlternative form of dalradian.

   The age of the Irish Dalradian is also not fully clear (Daly 2001).

   2011, A. W. A. Rushton, P. M. Brück, S. G. Molyneux, A Revised Correlation of the Cambrian Rocks in the British Isles

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   Carrying this reasoning to its ultimate conclusion, the Dalradians can be considered as including the Central Highland Division as its basal unit and the late Proterozoic Southern Highland Group at its top (the classification adopted here; Table 2.2), covering a time span of at least 200 Ma and possibly much more.

   2009, K. W. Glennie, Petroleum Geology of the North Sea, page 49