594 . Transactions. 
made. 
The buried forests and old land-surfaces at Thames, Coromandel, 
Opotiki, and Gisborne, and those of the Hamilton (70, p. 36; 73, p. 459; 
75, p. 410), Taranaki, and Christchurch districts, probably belong to this 
period of oscillation. The submerged forests of other parts of New Zealand, 
most of which occur at sea-level on the coast, may have been formed during 
slight movements of still more recent date. This especially applies to the 
scrub - covered land - surfaces occurring a little below high- tide mark in 
elevated to this extent. 
Posr-TERTIARY VoLcaNic Rocks. c 
| The post-Tertiary volcanic rocks of New Zealand are confined to the — 
North Island. They consist of the three following groups: (1) Basaltic 
rocks that occur at many points near the west coast from Kawhia to 
Auckland and in North Auckland Peninsula; (2) rhyolitic flows, brecoias, 
and tuffs that cover large areas in the Taupo-Rotorua zone, and OO a 
near Waihi and probably other parts of Hauraki Peninsula; and (3) the — 
andesitic cones of Egmont, Ruapehu, and adjacent mountains, Edgecum)® 
White Island, and probably other volcanoes. | 
