An extinct andesite cone. The lava was thick so it formed a steep-sided cone, which has been weathered over time to form the present shape of the island. Last erupted between 1 and 3 million years ago.
Acknowledgement: Dick Veitch
An extinct andesite cone. The lava was thick so it formed a steep-sided cone, which has been weathered over time to form the present shape of the island. Last erupted between 1 and 3 million years ago.
Acknowledgement: Dick Veitch