Age of Cretaceous silicic volcanism at Kyeburn, Central Otago, and Palmerston, eastern Otago, South Island, New Zealand

Potassium‐argon biotite ages for silicic tuffs in Kyebum Formation (Cretaceous) near Naseby, Central Otago, and biotite‐ignimbrite in Shag Point Group (Late Cretaceous) near Palmerston, eastern Otago, are 105–107 Ma and 101–103 Ma, respectively. The two localities thus give evidence of mid‐Albian (mid‐Cretaceous) subaerial volcanism in Otago. These rocks may correlate with similar silicic volcanic rocks (107–112 Ma) in Ohika Formation (Cretaceous) in the Lower Buller Valley, North Westland.