An edition of A palaeogeological map of the Lower Palaeozoic floor below the cover of Upper Devonian, Carboniferous and later formations (1978)

A palaeogeological map of the Lower Palaeozoic floor below the cover of Upper Devonian, Carboniferous and later formations

with inferred and speculative reconstructions of Lower Palaeozoic and Precambrian outcrops in adjacent areas

By L. J. Wills