In eastern Wairarapa indurated sedimentary “basement” forms an almost continuous belt some 140 km long and 3–15 km wide, generally overlain unconformably by late Cenozoic strata or faulted against Late Cretaceous-Early Tertiary rocks. These “basement” rocks, previously considered to be Late Jurassic-Early Cretaceous (Torlesse Supergroup) or Early Cretaceous (Taitai-Clarence Series) are mostly Motuan (Albian; Clarence Series), but locally probably as old as Urutawan (Albian). No base to the sequence is known.