by Gelogia Team | Oct 27, 2024 | Petrology
Sediments are materials formed due to mechanical or chemical activity by the agents of denudation on preexisting rocks. They are deposited in a stratified fashion, layer after layer, at the surface of the lithosphere. Lithification of the sediments at relatively low...
by Gelogia | Nov 15, 2022 | Petrology, Uncategorized
Metamorphic Textures Small-scale features that occur in virtually all of the rock body at the microscopic scale The term ‘Fabric’ is also used synonymously. As the rock-forming processes differ among types of metamorphism, the resulting texture is also different....
by Gelogia | Nov 5, 2022 | Petrology
Classification Contact Metamorphism Pyrometamorphism Regional Metamorphism Orogenic Metamorphism Burial Metamorphism Ocean Floor Metamorphism Hydrothermal Metamorphism Fault-Zone Metamorphism Impact or Shock Metamorphism 1. Contact Metamorphism Temperature is the...
by Gelogia | Nov 4, 2022 | Petrology
Four types of Metamorphic agents Temperature Pressure Directive stress Chemically active fluid/metamorphic fluids Temperature In regular continental crust, a typical geothermal gradient within the first 3 to 5 kilometers (2 or 3 miles) of Earth’s surface is...
by Gelogia | Nov 1, 2022 | Petrology
What is Metamorphism? The term metamorphism comes from the Greek (meta morph), meaning “change of form. The International Union of Geological Sciences (IUGS) defined Metamorphism as – “a process involving changes in the mineral content/composition and/or...
by Gelogia | Feb 17, 2022 | Petrology, Physical Geology & Geomorphology, Structural Geology
Structural geology is concerned with rock deformation on both a big and microscopic scale. Its research ranges from submicroscopic crystal lattice flaws to fault formations and fold systems in the Earth’s crust. Structural geology advanced significantly in the...
