Disharmonic folds in gneiss. Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks.
Blue Tiger Eye Crystal Ball
SC.4.E.6.1 Identify the three categories of rocks: igneous, (formed from molten rock); sedimentary (pieces of other rocks and fossilized organisms); and metamorphic (formed from heat and pressure).
These rock layers started out flat and have been compressed into accordion shapes by regional pressures.
Metamorphic Rock Facts for Kids - Information & Examples
Examples of Igneous, Metamorphic, Sedimentary Rocks; Webelos, Geologist
This is a small study booklet that shows a great deal of useful information about what metamorphic rock is, how it is formed and also shows many examples of the multiple kinds of metamorphic rock.
Examples of Igneous Rocks | Igneous Sedimentary And Metamorphic Rock Examples
conglomerate|Rocks: Igneous, Metamorphic and Sedimentary Rocks hold the history of the earth and the materials that will be used to build its future.