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97. A Nuée ardente is a phenomenon associated with lava flows 98. Volcanic vents that emit only gases are called fumaroles 99 The volcanoes of the Cascade Range are primarily cinder cone volcanoes ESSAY /FILL-IN 100. What type of magma composition is commonly erupted on the continents along a 102. A Place your anavwera to questions on the answer sheet provided by your in apropriate word, phrase, or short essay to answer the following questions. zone? texture refers to rocks composed mainly of visible crystals greater than texture refers to rocks composed mainly of uniform crystais that can be seen the aid of a microscope type of extrusive igneous rock.) Which tabular, discordant igneous rock body intrudes across bedding planes? 103. When lava cools very rapidly preventing the growth of crystals crystalsis formed (a common 1 104. What term(s) denotes the larger mineral grains in a porphyritic igneous rock? 105. 106. Which tabular, concordant igneous rock body intrudes between bedding planes? is the name given to molten rock below the Earth's surface. 108. Igneous rocks are classified on the basis of texture and 109. Ca-rich Plagioclase feidspar and Na-rich Plagioclase feldspar are all minerals found on the 110. Olivine, pyroxene, amphibole, and biotite are all minerals found on the Branch of Bowen Reaction Series branch of Bowen's reaction series 111. A large, mushroom-shaped pluton commonly formed by the inflation of a sill is a 112. Layering of minerals in a magma chamber from more mafic on the bottom to more felsic on the top 113. This type of feature occurs when lava is extruded underwater 114. Which of the three types of volcanoes 115. A relatively small, summit depression on a volcano, marking a former eruptive vent, is a 116. Large, volcanic depressions formed by subsidence and collapse are known as 117. What kind of volcanoes are Mt. St. Helens and the other volcanoes of the Cascade range? 118. The most abundant gaseous component of magma that is typically vented via outgassing by a consists almost entirely of pyroclastic flows? volcano, is What term describes the fragmental volcanic material associated with explosive eruptions? 119. 120. is a dangerous, fast moving, hot, turbulent cloud of volcanic gases and fine-sized, pyroclastic particles and most likely buried Pompei when Mt. Vesuvius (near Naples Italy) erupted and more recently caused the destruction of St. Pierre on Martinique 121. What specific type or subcategory of volcano is associated with the most violent and dangerous eruptions that includes the collapse of the volcano? 122. Composite cone volcanoes are also known as 123. The largest volcanoes on Earth are of the type known as 124. Another term for a volcanic mudflow is a 125. The Hawaiian Islands are composed almost entirely of the rock 126. What term describes a liquid's flow characteristics? 127 lava denotes a basaltic lava flow covered with jagged, angular, congealed lava rubble. 128. 129. Which basaltic lava flow has a relatively smooth, ropy surface? A fissure eruption produces basalts, which flood an area, and occur along linear

Answer 1

100. Magma having calc alkalinic composition is generally found at subduction zones.

101. Coarse grained Phaneritic texture, mostly found in intrusive rocks refers to rocks composed of visible crystal greater than 1 inch

102. Equigranular texture refers to rock composed of mainly uniform crystal that can be seen without the aid of microscope.

Equigranular texture is further divided into

Panidomorphic, hypidomorphic, allotripmorphic, microgranular, orthophyric and felsitic on the basic of growth of grain shape.

103. Glassy texture is formed when cooling is very rapid and lava failed to crystallized. For e.g, obsidian is extrusive Igneous rock having glassy texture.

104. Large crystal refers to as phenocryst in a fine grained material ( ground mass) and this Igneous texture is known as Porphyritic texture cosisting of two different sized crystal.