In this article we will discuss about:- 1. Introduction to Rocks 2. Geological Work of Atmosphere (Rock Weathering) 3. Structural Features 4. Unconformity 5. Joint Structures. Introduction to Rocks: Rocks exposed at the surface of the Earth are subject to direct or indirect attacks of a number of natural agencies such as atmospheric gases, heat, […]
Rocks: Introduction, Structural Features and Uniformity | Geology
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Twinning in Crystals: Meaning, Types and Laws | Rocks | Geology
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In this article we will discuss about:- 1. Meaning of Twinning in Crystals 2. Some Illustrations of Twinning in Crystals 3. Types 4. Laws. Meaning of Twinning in Crystals: Generally crystals grow from the melts as individual specimens, each having its own shape, form and crystallographic characteristic. Sometimes, however, two crystals of the same compound […]
List of Rock Forming Minerals | Geology
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Only a few (not more than one hundred) minerals form the great bulk of the rocks of the crust of the Earth. These very common minerals have been grouped together as rock forming minerals. Even among these minerals, only about 25 or so make up almost 99.5 percent of the rocks one commonly comes across. […]