Question: Derived from the characteristically coloured marls and sandstones which occur beneath the chalk is a late Cretaceous lithostratigraphic group,  particularly along the coast of one of six countries that make up what?
Sentence (from "Hibernian Greensands Group"): The current names replace an earlier situation where the present group was considered to be a formation and each of the present formations was considered a 'member'.
Relevant evidence: No