Parnell Grit outcrop at Northern end of beach. Collecting should be restricted to below the high tide mark. Zeolitised clasts in the beds are derived from the Manukau stratovolcano with some input from the Kaipara stratovolcano - both of these are of Miocene age and apart from the uplifted fault block forming the Waitakere Ranges they exist only as magnetic anomalies.
Mineral List
6 entries listed. 4 valid minerals.
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