enow.com Web Search

  1. Ad

    related to: metamorphic rocks and plate tectonics video for kids free full

Search results

  1. Results from the WOW.Com Content Network
  2. Tectonic phase - Wikipedia

    en.wikipedia.org/wiki/Tectonic_phase

    Tectonic phases can be extensional or compressional in nature. When numerous subsequent compressional tectonic phases share the same geodynamic cause (usually some plate tectonic mechanism) this is called an orogeny. During an orogeny tectonic phases lead to mountain building, which causes deformation and metamorphism of rocks.

  3. Rock cycle - Wikipedia

    en.wikipedia.org/wiki/Rock_cycle

    These rocks are fine-grained and sometimes cool so rapidly that no crystals can form and result in a natural glass, such as obsidian, however the most common fine-grained rock would be known as basalt. Any of the three main types of rocks (igneous, sedimentary, and metamorphic rocks) can melt into magma and cool into igneous rocks. [2]

  4. Shield (geology) - Wikipedia

    en.wikipedia.org/wiki/Shield_(Geology)

    These rocks are older than 570 million years and sometimes date back to around 2 to 3.5 billion years. [ citation needed ] They have been little affected by tectonic events following the end of the Precambrian, and are relatively flat regions where mountain building, faulting, and other tectonic processes are minor, compared with the activity ...

  5. Eclogitization - Wikipedia

    en.wikipedia.org/wiki/Eclogitization

    Eclogitization is the tectonic process in which the high-pressure, metamorphic facies, eclogite (a very dense rock), is formed. This leads to an increase in the density of regions of Earth's crust , which leads to changes in plate motion at convergent boundaries (where rock sinks beneath other rock).

  6. Geology of the Rocky Mountains - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Rocky_Mountains

    The rocks in the Rocky Mountains were formed before the mountains were raised by tectonic forces. The oldest rock is Precambrian Wyoming craton that forms the core of the North American continent. The Wyoming Craton originated as a 100,000 km 2 middle Archean craton that was modified by late Archean volcanic magmatism and plate movements and ...

  7. Metamorphic rock - Wikipedia

    en.wikipedia.org/wiki/Metamorphic_rock

    Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock ( protolith ) is subjected to temperatures greater than 150 to 200 °C (300 to 400 °F) and, often, elevated pressure of 100 megapascals (1,000 bar ) or more, causing profound physical or chemical changes.

  8. Rock (geology) - Wikipedia

    en.wikipedia.org/wiki/Rock_(geology)

    [19]: 31–33, 134–139 Metamorphic rocks compose 27.4% of the crust by volume. [13] The three major classes of metamorphic rock are based upon the formation mechanism. An intrusion of magma that heats the surrounding rock causes contact metamorphism—a temperature-dominated transformation.

  9. Geology of the Himalayas - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Himalayas

    The metamorphic rocks of the Himalaya can be very useful in deciphering and coming up with models of tectonic relationships. According to Kohn (2014), the exhumation of metamorphic rocks can be explained by the Main Himalayan Thrust. [20]

  1. Ad

    related to: metamorphic rocks and plate tectonics video for kids free full