Age of Wangapeka Formation and Mt Arthur Marble, Mount Owen, North-West Nelson

Abstract

Poorly preserved graptolites of Upper Ordovician (PEastonian) age were found in place on the western flanks of the Owen Massif, in the West Nelson highlands.The fossils were found about 50 ft stratigraphically above the top of the Mt.Arthur Marble, in slates of the Wangapeka Formation, which was previously tentatively considered to be Silurian