What minerals are in obsidian rock? On what basis are sedimentary rocks identified? What are metamorphic rocks used for? What are the two textures of metamorphic rocks? What is the mineralogy of granite? In what section(s) of the rock cycle are gemstones formed?
How does cooling rate affect the crystal size of minerals in igneous rocks? Why is quartz a bad mineral to use to determine a metamorphic environment? Why do extrusive rocks have small crystals? How are native elements different from other minerals? Why does obsidian co...
Description. The term "Vitric properties" (from Latin vitrum, glass) refers tolayers with volcanic glass and other primary minerals derived from volcanic ejectaand which contain a limited amount of short-range-order minerals or organo-metallic complexes. ...
Extrusive igneousrocks erupt onto the surface, where they cool quickly to form small crystals. Some cool so quickly that they form an amorphous glass. These rocks include: andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria, and tuff. What is an intrusion in rock layers? An intrusion...
Feldspar refers to a group of related silicate minerals that can contain aluminum and other elements. Feldspar comes in several different colors, including pink, brown, white, gray, and blue.Answer and Explanation: Yes, a cooled magma chamber can produce feldspar, depending on the silica content...