1. The city was entombed in volcanic lava.

2. The volcanic lava solidifies as it cools.

3. Pumice is produced in volcanic eruptions.

4. There have been several volcanic eruptions this year.

5. Volcanic activity is highly episodic in nature.

6. The place was recently visited by a serious volcanic eruption.

7. The volcano spewed out more scorching volcanic ashes, gases and rocks.

8. A cloud of volcanic ash is spreading across wide areas of the Philippines.

9. Volcanic activity has created thermal springs and boiling mud pools.

10. The rock is volcanic in origin.

11. Over 200 people have been killed by volcanic eruptions.

12. Molten volcanic lava solidifies as it cools.

13. The ridge consists entirely of volcanic rock.

14. The French Revolution was a volcanic upheavalin European history.

15. Volcanic ash showered down on the town after the eruption.

16. The violent volcanic forces upheaved the land of the whole area.

17. The vast volcanic slope was eerily reminiscent of a lunar landscape.

18. The islands are volcanic.

19. Fresh volcanic rocks are poor conductors of electricity.

20. While forests were being buried there was volcanic activity.

21. The central area is volcanic in origin.

22. Many oceanic islands are volcanic.

23. The finest fragments make volcanic ash and dust.

24. Chapter 3 Volcanic eruptions are difficult things to classify.

25. There are five major types of volcanic activity.

26. The volcanic eruption on Krakatoa had an explosive power equivalent to 20,000 tons of TNT.

27. The feldspars in volcanic lava flows can also be problematic.

28. The high level of radiation in the rocks implies that they are volcanic in origin.

29. Where oceanic lithosphere is subducted beneath another oceanic part of a plate the associated volcanic activity and produce an intra-oceanic island arc.

30. For example, many early human artifacts, such as arrowheads, are made of obsidian(Sentencedict), a volcanic glass.

1. The city was entombed in volcanic lava.

2. The volcanic lava solidifies as it cools.

3. Pumice is produced in volcanic eruptions.

4. There have been several volcanic eruptions this year.

5. Volcanic activity is highly episodic in nature.

6. The place was recently visited by a serious volcanic eruption.

7. The volcano spewed out more scorching volcanic ashes, gases and rocks.

8. A cloud of volcanic ash is spreading across wide areas of the Philippines.

9. Volcanic activity has created thermal springs and boiling mud pools.

10. The islands are volcanic.

31. Back-arc spreading may be initiated within the volcanic arc because the high heat flux from below weakens the lithosphere.

32. They could be likened to the dynamic force of a volcanic eruption.

33. Forest drive with magnificent views of the volcanic ring of hills of which Slieve Gullion forms a part.

34. We pass some strangely shaped mountains that must have been volcanic plugs poking up through vast panoramas.

35. Others held that meteorites were more immediately terrestrial in origin, being akin to volcanic bombs ejected by violent eruption events.

36. One of the ingredients it requires is hydrogen, a gas that is produced in great quantities during volcanic eruptions.

37. Their campsites, graves, and houses had been buried and protected by a volcanic eruption.

38. The massive volcanic eruption could affect the climate of the whole planet.

39. The shape and direction of the valleys have been influenced by the location of the more easily eroded volcanic material.

40. Much of the mountain consists of volcanic ash, long since hardened to jagged rock.

41. There are significant differences in the morphology and degree of volcanic activity associated with these two types of rift.

42. The major differences in rift characteristics relate to their position with respect to plate boundaries and the intensity of volcanic activity associated with them.

43. The island became covered with vegetation, fossils of which are sometimes found in the volcanic ashes.

44. Sumatra is composed of old, thick continental crust comprising volcanic rocks of Permian, Cretaceous and Cenozoic age.

45. Multicolored volcanic ash flows, long since hardened to jagged rock, reach into the sea like fantastic taffy mountains.

46. Thus the volcanic rocks formed are drastically different from their oceanic counterparts.

47. Eventually granite intrusions are emplaced at high levels within the mountain mass and volcanic activity develops.

48. It therefore follows that all sedimentary bodies, other than deep sea oozes and volcanic ash deposits, are likely to be diachronous.

49. Various experiments done in volcanic environments have shown that proteinoid globules are very likely to form in such regions.

50. Natural catastrophes, such as volcanic eruptions, may result in sites being buried very rapidly.

51. Fairly consistent patterns are evident in the location of the volcanic activity with respect to the fringing trench.

52. These changes have been related to volcanic activity in this eruptive neighbourhood.

53. Early on, studies of the equatorial regions revealed great volcanic mountain systems and several apparent large impact craters.

54. This heating and crushing was due to nearby igneous volcanic activity about 400 million years ago.

55. A word here in passing about what actually goes to make up a typical volcanic eruption cloud.

56. When lava flows are erupted at the surface, they are necessarily rapidly chilled, and volcanic glasses are common.

57. The city was buried under several meters of volcanic ash, many of the inhabitants being asphyxiated in their houses.

58. Anaxagoras planned to demand some solid data on the volcanic activity which kept shaking Mount Aetna.

59. This period was sufficiently long for the widespread planation of oceanic islands, many of them volcanic.

60. A complicated pattern of basins and ridges hind the volcanic arc.

61. Instead, the basalt flows and volcanic central peaks are found to be very closely associated with large craters.

62. Perlite: A volcanic material like vermiculite and with many of the same properties. When dry it is easily blown around.

63. So volcanic rocks are composed of only a few mineral groups, each group having its own characteristic atomic structure.

64. Volcanic rocks cool quickly, trap the argon, and so give good dates.

65. The buried artifacts were found between layers of volcanic ash and other substances.

66. In one dip in the mountains, where the sun has just sunk, there is a red volcanic brilliance.

67. The important properties of these three principal volcanic rock groups can be summarized in simple tables.

68. The characteristics of the various types of volcanic eruption are considered in the general texts mentioned above.

69. Volcanicity and magma emplacement, largely in the form of large granite intrusions, characterize the volcanic arc.

70. El Golfo An unusual, vividly green lagoon, separated from the sea by a beach of black volcanic sand.

71. The Banda archipelago is volcanic and luxuriously tropical, perfect for snorkelling and diving.

72. Most volcanic rocks contain some phenocrysts - they are a bit like the pips in raspberry jam.

73. We're talking about the combined and simultaneous effect of a massive thermonuclear detonation, a volcanic eruption and an earthquake.

74. Then I remembered the room of the sirocco in a Sicilian palace made of pink volcanic sugar.

75. More majestic, in central North Island, was a flight over volcanic territory.

76. These are frequently associated with volcanic rocks of oceanic type.

77. Basalts are examples of basic volcanic rocks, while andesites are intermediate between basic and acid.

78. Convergent boundaries between oceanic lithosphere are marked by an oceanic trench, a volcanic island arc and a Wadati-Benioff zone.

79. It turned out that that impact was not limited to volcanic eruptions.

80. It is commonly said that tsunamis are usually triggered by earthquakes or violent volcanic explosions.

81. RioFinex examined the Ordovician volcanic rocks of County Tyrone for base metals but found only minor intersections of low-grade copper mineralisation.

82. The dizzying heights and plummeting depths of the volcanic mountains have their social parallels in this deeply divided country.

83. But it has endured because it was constructed of brick and volcanic rock between 1783 and 1792.

84. We saw dead volcanic lakes, grey under the grey sky.

85. Was there a volcanic pimple on the end of my nose?

86. The complexity of some volcanic eruptions is illustrated by the detailed observations made of Mount St Helens in 1980.

87. Solids can release gases back into the atmosphere when heated and pressed by volcanic activity.

88. Perlite: A volcanic material like vermiculite and with many of the same properties.

89. Major volcanic eruptions also project significant quantities of tephra into the earth's upper atmosphere(/volcanic.html), with global effects.

90. There was no shortage of excellent building materials from varied marbles to stone, brick and volcanic substances.

91. Below the tower, clouds swirl across a grey moonscape lit from moment to moment by volcanic fires.

92. She was too preoccupied by her inner turmoil to fully appreciate the bubbling volcanic mud pools in the weird, lunar-like springs.

93. The Napa Valley, raised from the primordial sea, was formed by violent volcanic eruptions.

94. Nestled within these bleak volcanic highlands are fertile valleys filled with game plentiful enough to satisfy even the appetites of dragons.

95. This time around, Dirk Pitt is nursing injuries sustained during a volcanic eruption.

96. Rage rarely visits that open, smiling face but Massimo was volcanic.

97. Just ahead lay the outlying volcanic islands of To Shima and Nii Shima, and the wind carried us slantwise between them.

98. Over aeons, the undulating plains have been showered by volcanic ash blown westward from Ngorongoro, Lemagrut and other now-extinct volcanos.

99. Where there is evidence for volcanic activity on the Moon, it generally seems to be associated with impact events.

100. The codename was chosen because rhyolite is a volcanic rock containing colourful pieces of quartz set in a mass of crystals.

101. Volcanic ash rose into the air and encircled the earth, choking out all the air and blotting out all the light.

102. In this case, it is the formation of the rock through volcanic activity, which drives off any argon formerly present.

103. Although it is one of the most widely-known volcanic rocks, obsidian lava flows are rare.

104. But the hint of volcanic force is no longer there, maybe because his left eye now somehow appears normal.

105. The plates realigned and subduction resumed, sparking volcanic activity which spewed forth the granite rock covering much of the Sierras.

106. Unlike most volcanic rocks, obsidian does not contain phenocrysts; it is, so to speak, all glassy groundmass.

107. Large areas of island are covered with thick deposits of black volcanic ash, known locally as picon.

108. Warped and folded Paleozoic strata and reddish Tertiary volcanic rocks are capped with dark Quaternary basalt flows.

109. Tsunamis are caused by violent oceanic events such as earthquakes, undersea landslides, volcanic explosions, and impacts.

110. Between the outer-arc ridge and the volcanic arc a forearc basin may be formed.

111. Volcanic lines and clusters also exhibit patterning at the regional and local scale with both radial and rectilinear arrangements being found.

112. Volcanic rock can become favorable oil - gas reservoirs.

113. It mainly constitutes by hydromica, volcanic material, nud-iron material.

114. The trees were blasted by the volcanic eruption.

115. The waves beveled a volcanic island.

116. St Vincent is a lush, volcanic island.

117. For millions of years, the area was highly volcanic.

117. try its best to gather and make good sentences.

118. These volcanic vents are home to exotic deep-sea creatures that will be studied by marine biologists Dr Jon Copley and Professor Paul Tyler.

119. 39A U.S. Marine, killed by Japanese sniper fire, still holds his weapon as he lies in the black volcanic sand of Iwo Jima, on February 19, 1945, during the initial invasion on the island.

120. Geology To cause ( molten lava ) to pour forth from a volcanic vent.

121. A young silverback mountain gorilla poses on the rim of a volcanic crater with a lake below in the background.

122. And collective effects of endogenetic and exogenic forces such as geologic structure, volcanic activity and sea level change controlled the origin and evolvement of the sub-order geomorphic types.

123. And if I did find the right one, I might never know it because I might overlook that black piece of volcanic glass, or, much more likely, Andy put it into his pocket and took it with him.

124. Ciweigou deposit is one of the typical volcanic rock gold deposits in the country.

125. The Late Paleozoic volcanic rocks (from Early Devonian to Early Permian) were widely distributed in the south margin of the Altai Mountains.

126. Thus, fossil fuel carbon emissions are eighty times larger than background volcanic outgassing.

127. Active faults and lineaments, and recent volcanic activity were re - examined.

128. A lake of southwest Oregon in a volcanic crater of the Cascade Range.

129. Coincidentally, the masterpiece was inspired by the powerful volcanic eruption of Krakatoa in 1883.

130. Crystal twinning patterns in a leucite crystal from volcanic rock, observed in polarized light by Dr. Michael M. Raith of the Steinmann Institut, University of Bonn, Bonn, Germany. (Dr.

131. Geologist Giday WoldeGabriel of Los Alamos National Laboratory was able to use volcanic layers above and below the fossil to date it to 4.4 million years ago.

132. New Caledonia in the Pacific volcanic belt, are frequent earthquakes and volcanic eruptions in the region.

133. Volcanic rock from two eruptive sources, Taoyuan - Hongxing and southern Dapingfang weaves and superimposes reciprocally in strata.

134. Forty-seven million years ago it was a volcanic lake surrounded by a steamy sub-tropical forest.

135. The volcanic rocks in this region were not only characteristic of vertical partition and evolution, but also of horizontal zoning.

136. Weather satellites have observed a ring of volcanic ash girdling the earth.

137. Tsunami: A great sea wave produced especially by submarine earth movement or volcanic eruption.

138. Constant volcanic and earthquake action occurs here , sometimes with cataclysmic results.

139. The carrier of the modified filter medium is the volcanic rock coated with a polycondensate modifier.

140. Perlite is a light - weight odorless, sterilized, heat expanded volcanic mineral.

141. The mineral can be found in hot spring deposits and as a volcanic sublimate product.

142. Mount Unzen has been spewing out volcanic ash, gas, and rock today.

143. The volcanic rocks in the study area all belong to sub alkaline series including olivine basalt, andesite and dacite, from basic to intermediate, and to acid.

144. The volcanic eruption at Santorini 250 years later destroyed the palaces again, although Knossos was rebuilt for a new dynasty.

145. Some aerosols occur naturally like sea spray and volcanic emissions, but NASA estimates ten percent of the total aerosols in the atmosphere are caused by people.

146. Lianhuazhai volcanic cycle which occurs in late Jurassic epoch is unimodal rock association composed of rhyolite.

147. Although it resembles an impact crater, it formed when a volcanic dome hardened and gradually eroded, exposing the onion-like layers of rock.

147. Wish you will love and make progress everyday!

148. But, with constant launch and deepgoing of exploration work of volcanic reservoir, the research methods of reservoir connected with volcanic rock is increasingly becoming mature.

149. Volcanic tremor is due to the oscillation of magmagic gas or due to the crater - wall falldown.

150. Volcanic eruptive activities occurred from Cambrian to Permian , most intensely in Devonian and Carboniferous.

151. The Tai Long Wan coast nearby showcases a breathtaking coastal landform of volcanic rocks, and justifiably rated as No. 1 of "Top Ten Hong Kong Natural Attractions" many times.

152. A man gets a panoramic view of the volcanic and windblown peaks of the Black desert.

153. Volcanic rock is widely developed both in the vertical and horizon direction in Huanghua depression.

154. A volcanic peak, 4,39.4 m (4, '2 ft) high, of the Cascade Range in northern California. Discovered in 827, it has hot sulfurous springs near the summit.

155. Taoyuan gold deposit locates in impurity carbonate rock containing volcanic materials of Lower Carboniferous, lower rock formation, littoral- neritic facies.

156. There is also a product known as 'Fango Mud' which is a form of silica aspirin taken from fresh volcanic ash that can be added to your bath.

157. On tectonic discrimination plots of trace elements, all samples of volcanic rocks fall into the field of volcanic island arc and back arc basin.

158. The study of petrology, mineralogy and geochemistry suggests that augite latite and augite monzonite are cognate, belonging to the upper and root parts of the volcanic dome respectively.

159. The volcanic activity is a basic geological process, and provides important foundation for the modern material civilization.

160. Radar mapping of the planet shows lots of craters and that 91% of the landforms are volcanic.

161. Pyroclastic base-surge deposits of volcanic cluster in the Longgang region of Jilin Province is one of the few neoteric maar deposits which are preserved in good condition in China.

162. lahar—an avalanche of volcanic ash and rock mixed with water—50 kilometers (30 miles) down the west side of the volcano summit.

163. The alkine and K rich volcanic rocks, which are source rocks of zeolite ores, formed in middle late Yanshanian stage, with tectonic dynamic mechanism of compression and left lateral shearing.

164. The volcanic plug might be black Plasticine, the castle balanced solidly atop it a skewed rendition of crenellated building bricks.

165. They were carved from locally quarried tufa—a soft volcanic stone—between 800 and 1722, when a Dutch explorer discovered the island.

166. That is to short-circuit the natural geological process of weathering and use the CO2 to convert volcanic rocks into limestone.

167. The holocrystalline porphyritic olivine basalts and pyroclastic rocks are the components of Pleistocene to recent volcanic activities.

168. If too much volcanic heat discharged, the crater's ice pack will melt away entirely.

169. Trapped water was found in tiny volcanic glass beads returned to Earth in 1972 by the final manned mission to the moon, Apollo 17.

170. At deeper levels, the volcanic deposits were intruded by molten magma, which slowly crystallised to form granite.

171. Two volcanic structures, hornitos and accretionary lava ball, were wrongly named as "fumaroles" and "volcanic bomb" respectively in the Geopark.

172. Of volcanic origin, it has generally rugged terrain with abundant Norfolk Island pine.

173. Earthquake, volcanic eruption, flood, high tide, typhoon rain - storm or similar hazards of wind or water.

174. A whirlwind computer animation sequence gives you a ride through the center of the earth to see the process of the geological forces that cause a volcanic eruption of earthquake.

175. Thyon volcanic rocks are classified as alkali basalts, with pyroxene megacrysts, and deep-seated mantle xenoliths such as augite and peridotite have been observed in some basaltic layers.

176. The Hongtoushan copper - zinc deposit was formed in submarine volcanic eruptions - sedimentary environment in Archean intracratonic rift trough.

177. The intermediate-acid volcanic rock is the main metallogenic mother rock. the ductile-brittle shear zone is the important ore conducting structure for the formation of gold deposit.

178. The lithology of deep volcanic reservoir in Xingcheng area of Xushen gas field is complex.

179. The study on the structure, volcanic sediment and magmatism shows that the east Kunlun Mountains belong to the Palaeo-Tethys active continental margin during the Hercynian -Indosinian period.

180. If directed toward inside again, is an unbroken volcanic lake, appear blue, orange, red, white wait seven colors interlaced lake, transpiration fast-you wonderful phantasy.

181. The rifting magmatic action is mostly bimodal volcanicity in volcanic grabens located at both sides of the CSTZ formed and the synchronous magmatic irruption is also bimodal posture .

182. Her bones preserved in Herculaneum's volcanic tomb for nearly 2, 000 years, a Roman woman is still adorned in rings of gold, carnelian, and jasper.

183. Favorable reservoirs may be composed of sandstones, conglomerates basement metamorphic buried hills, and volcanic rocks.

184. However, with the Tasman Sea and New Zealand volcanic ash to remove the direction of Australia will resume flights to the airport.

185. The inner subfacies of extrusive facies of subaqueous volcanic rocks are good reservoirs.

186. Gacun argentiferous polymetallic ore deposit is a volcanic exhalation - sedimentary deposit.

187. In the American West, megafloods carved out a vast region called the Channelled Scablands, spanning hundreds of kilometres from Spokane, Washington, west to the volcanic Cascades Range.

188. Coincidentally, it is thought that the masterpiece was inspired by the blood red skies caused by the powerful volcanic eruption of Krakatoa in 1883.

189. The deposit is hosted in the Mesozoic Upper Cretaceous volcanic rocks, associated with dacite, andesite, andesitic porphyrite and rhyolite.

190. A bridge collapsed in Buenos Aires and a volcanic eruption in Jakarta.

191. The volcanic stone is subject to weathering, and intensive conservation efforts are needed to help preserve Rapa Nui's stone legacy in its present, awe-inspiring state.

192. Based on systematic petrochemistry and detailed field survey this paper explores the tectonic settings of volcanic rocks bordering Yunnan and Guangxi during Permian Middle Triassic.

193. The (examination) of the petrography shows that the volcanic terrains in Tengchong are typical of the basalt-(andesite)-(dacite) arc volcanic rock associations of the calc-alkaline series.

194. In the melange zone there occur Devonian island arc-type intermediate and intermediate-acid volcanic rocks, which conformably overlie siliceous pelite.

195. The lower level of Yingcheng volcanic rock is tholeiitic, and the upper is alkalic series.

196. In 2008, research of volcanic glass beads brought attention to the fact that there might be more water in the moon's interior than scientists had previously thought.

197. A group of volcanic islands in the northern Atlantic Ocean between Iceland and the Shetland Islands. Originally settled by Celtic peoples, the islands passed to Denmark in 380.

198. They are found in volcanic "pipes" called kimberlite . The name comes from Kimberley, the place in South Africa were diamonds were found in the nineteenth century.

199. Vocalnic activity characterizes extru - sive facies - spurt - deposit facies, which constitutes multi - rhythmic volcanic spurting.

200. Such voluminous and rapid volcanic activities in Phanerozoic have commonly been thought to be a cause for zoobiocenose extinction .

201. Volcanic sedimentation is a frontier realm between volcanology and sedimentology.

202. At the Galapagos Rift, volcanic activity beneath two geologic plates renews the earth's crust.

203. A man removes volcanic ash from a roof in downtown Villa La Angostura, in Neuquen, some 1600 km south-west of Buenos Aires, on June 16, 2011.

204. NATO took the threat seriously enough to limit military exercises after volcanic glass built up in fighter engines.

205. That task falls to the Goma Volcanic Observatory, located in a dilapidated one-story building in the city center and staffed around the clock.

206. The Italian city of Bombay perished in a violent volcanic eruption.

207. Dense clouds of ash were generated during the volcanic eruption.

208. The subaerial and subaqueous volcanic rocks have significant differences in lithology, texture and structure, alteration, occurence, contact with underlying strata, pore and fissure development.

209. The sample consisted of pebbles of gypsum and fragments of volcanic rock.

210. In the foreground sits a cairn of red-brown volcanic stones, likely built by tourists. Locals usually dismantle the visitors' handiwork though.

211. The main rock type of the volcanic rock is trachyandesite with small amounts of trachyte, basaltic-trachyandesite and leucite basaltic-trachyandesite.

212. There are 5 kinds of geological settings: metamorphic basement area, geosyncline area, cover area, Mesozoic volcanic fault basin and tectonic magmatic active belts.

213. Volcanic lightning occurs when roiling ash particles rub against each other and become electrically charged.

214. According of east abyssal plain of the Okinawa Trough with some volcanic materials, it show strong magnetic characteristics different from other sediment environments.

215. Both subaerial and subaqueous volcanic rocks can be found in Yiagcheng Formation of Songliau Basin.

216. Its crystalline structure formed inside a bubble of volcanic gas as igneous rock cooled.

217. Therefore, the cooling was probably caused by a volcanic eruption.

218. There is important for recover history of the Holocene Volcanic and conclude environment of crater.

219. The diatreme breccia pipes belong to volcanic crater phase and volcanic conduit phase, and consist of breccias and binding material.

220. The Minqiao oilfield is located in the southeast of the Jinhu sag, west of Dongtai depression in the Subei basin. Volcanic rock oil reservoir has been found in the Funing Formation.

221. Dark-colored ash and tiny volcanic rocks (lapilli) carpet the crater floor.

222. In the U.S. there are large rhyolitic volcanoes in Wyoming, California, and New Mexico as well as in the Japanese islands and New Zealand's Taupo Volcanic Zone.

223. In each bimodal volcanic succession, there exists a differentiation crystallization relationship between basic and silicic lavas .

224. There are 59 Cenozoic cones, the volcanic texture of which may be classified into cone, dome, lava lake and maar.

225. The prediction of favorable volcanic reservoir with few drilling data is preliminary achieved in this study.

226. Tetrahedrite is a common cupreous sulfide mineral in the Ashele volcanic massive sulfide deposit.

227. Settlers from Fujian cleared the jungle to plant rice, sugar, and tea in the fertile volcanic soil, bringing their Min dialect and their worship of Matsu, goddess of the sea.

228. Jurassic volcanic rocks in Yingshan fault depression are mainly andesite, basalt, dacite , volcanic breccia and tuff.

229. Contemporaneous volcanic activity is represented by basic to intermediate lava and tuff.

230. A lost world populated by fanged frogs, grunting fish and tiny bear-like creatures has been discovered in a remote volcanic crater on the Pacific island of Papua New Guinea.

231. Three Sisters is one of three potentially active volcanic centers that lie close to rapidly growing communities and resort areas in Central Oregon.

232. I had to do an in - class presentation on volcanic rock formation.

233. The Sierra Nevada and the Cascade Mountains meet in Plumas County, and fall color against the grey backdrop of the volcanic rock that covers the region makes for dramatic views.

234. Marilyn's pitted skin, breasts of carved pumice, volcanic thighs, a face of ash.

235. But much about the impact of volcanic ash on jet engines remains unstudied.

236. On the morning of August 24, 79 AD, Mt. Vesuvius overlooking Pompeii suddenly shuddered and spewed out fiery volcanic ash.

237. Volcanic ash silted up the Columbia River 35 miles away.

238. There are many noticeable and well-developed joints in the volcanic crater group in the Changle area(), and they are unique in shape.

239. Abundant copper material was derived from volcanic rock series ( olivine tholeiite ) in the rift.

240. The volcanic rocks belong to high kalium calc alkalic series and can be divided into andesite, dacite, trachydacite and rhyolite by petrochemical composition.

241. The thrid part are tuff, ferruginous dolomite, crystal tuff and volcanic breccia.

242. Volcanic tremor is due to the oscillation of magmatic gas or due to the crater - Wall falldown.

243. Augite monzonite crystallized at high-temperature and over-hypabyssal conditions. The water-deficient, highly viscous magma was favourable to the formation of the volcanic dome.

244. A comprehensive study of Hanwang BIF shows that its ferruginous material was associated with volcanic hydrothermal solution and was formed in a marine chemical sedimentary environment.

245. A boat covered by volcanic ash sits docked on the bank of Nahuel Huapi Lake, also blanketed in volcanic ash, in Villa La Angostura in southern Argentina, Thursday June 16, 2011.

246. Clenched in the volcanic fist, the huge Basin was created By the motion of crustal plates.