31. The Tuxtla Mountains, a chain of volcanic cones blanketed by forest, rise from this plain. 32. By 1966, J�lnir had broken the surface and a volcanic cone of mafic tephra developed. 33. The volcanic cones of Karioi and Pirongia dominate the landscape near Raglan and Kawhia Harbours. 34. It is actually a relatively small volcanic cone constructed on a high Pleistocene volcanic edifice. 35. Ostrvica is actually the remains of destroyed volcanic cone . 36. Later, a volcanic cone formed, experiencing explosive activity and eventually extruding a long lava flow. 37. The current volcanic cone formed during the present eruptive period, which began 150 thousand years ago. 38. The surrounding walls are steep and the interior mostly barren-looking with a scattering of volcanic cones . 39. It has an arid volcanic landscape and there are about 300 volcanic cones on the island. 40. With the exception of one, the volcanoes form a nearly linear chain of circular volcanic cones .
