The north end of Otiora Bay the same palaesol as in Oira Bay is overlain by the Ruamata Pumice Cone of Houghton et al, 1992. This pumice cone is different from the Oira Cone is that it has a varied eruption sequence as indicated by the pumice layers being intebedded with surge layers. It is suggested that the eruptions were from a slurry filled vent with seawater being the contributing spice to the eruptions.
The north end of Otiora Bay the same palaesol as in Oira Bay is overlain by the Ruamata Pumice Cone of Houghton et al, 1992. This pumice cone is different from the Oira Cone is that it has a varied eruption sequence as indicated by the pumice layers being intebedded with surge layers. It is suggested that the eruptions were from a slurry filled vent with seawater being the contributing spice to the eruptions.
A palaeosol (at head height) is overlain by debris avalanche deposits. Unknown where these fit into the stratigraphy of the volcano but the coarse graded units are composed of broken up lithic (lava) fragments and the sorting/grading indicates deposition by a rapid but waning current, typical of debris flows.
The same unit at the top of the lava flow in the above image here shows that the unit was not airfall, but by a flow perpendicular to the plane of the image.
A small synsedimentary normal fault is seen in the units above the irregular surfce of the lava flow.
