31. Tarawera and gave the impression that the mountain top was rough but showed no sign of volcanic vents . 32. Tens of thousands of years ago, a series of volcanic vents opened along the southeast shoreline of Oahu. 33. The Limburg is a mountain of volcanic origin, more precisely a formerly active volcanic vent of the Swabian Jura. 34. Dating from the early Jurassic period, this extinct volcanic vent was inhabited by local Aborigines for thousands of years. 35. Some experts believe primitive organisms could survive just as they do deep in the Earth's ocean near volcanic vents . 36. The lake is a 200-foot cauldron of water that simmers at 200 degrees, thanks to a volcanic vent below. 37. The volcanic vents and geysers are habitat for certain extremophile micro-organisms . ( C . Michael Hogan . 2010) 38. Some research has suggested that both the rille and Bla are volcanic vents , and lava flows created the features. 39. The Voltage Flow was erupted about 1.9 million years ago from several volcanic vents located north of Diamond Craters. 40. At least eight volcanic vents compose the Meager massif, with the Bridge River Vent being the most recent to form.
