WebSep 24, 2008 · Rocks that have cooled quickly from magma are referred to as extrusive igneous rocks, such as obsidian and scoria. Rocks that have formed from slow cooling … Web, fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes per year. Basalt is also an important rock type on other planetary bodies in the Solar System. Does obsidian cool faster than basalt?
Chapter 5 Flashcards Quizlet
WebAre phaneritic rocks fast or slow cooling? slow What is an example of a phaneritic rock? granite What is an example of a glassy rock? obsidian An igneous rock composed of … WebThese rocks include: andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria, and tuff. Pictures and brief descriptions of some common igneous rock types are shown on this … shelf life of nplate
4.1: Classification of Igneous Rocks - Geosciences LibreTexts
WebExtrusive igneous rocks have a fine-grained or aphanitic texture, in which the grains are too small to see with the unaided eye. The fine-grained … WebApr 3, 2024 · Formation of Igneous Rocks Igneous rocks are formed through the process of cooling and solidification of magma or lava. The cooling rate of magma or lava determines the texture and grain size of the rock. Slow cooling results in large mineral grains and a coarse texture, while fast cooling results in small mineral grains and a fine texture. shelf life of nitroglycerin pills