Petrography of quartz grains in beach and dune sands of
since 75 000t of quartz sand with 9096% quartz is dredged annually from the northern east coast of the Aupouri Peninsula (Schofield 1970; Isaac 1996). STUDY AREA The Aupouri Peninsula is a Pleistocene tombolo, which forms the northernmost tip of Northland, New Zealand (Fig. 1). Beach and dune sands on the western side of this