Mayor Island, Bay of Plenty, New Zealand
Hurihurihanga Bay
| Here the western margin of Te Ananui Flat (3), a fan of ignimbrite from the 6,340 year-old eruption, laps up against an old sea cliff formed by the caldera wall (fault) that truncates the pre-caldera lava sheild (1), and the remains of the remnants of a later lava shield (2). |
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An unrepeated (unacessable) sequence of ignimbrites, surge and airfall deposits in between the most recent and and lower lava flow, in the pre-caldera lava sheild. Note how the top lava flow has gouged through the tuff units. Both lava flows can be correlated with the top two lava flows in Opoupoto (Cathedral) Bay. |
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A closer view of the pyroclastic sequence at the top of the pre-caldera main cone. Mostly thin ignimbrites (massive units) and surge deposits (bedded units). . It is possible that this sequence is correlateble to the sequence in the caldera wall Location A, near Taratimi Bay. |
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| This is the base of the cliff in Hurihurihanga Bay, with two of the older lava flow units in the pre-caldera cone. Each flow has an obsidian selvedge at both top and bottom, and between them there is eroded remnants of intervening airfall eruptives. |
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