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  2. Migmatite - Wikipedia

    en.wikipedia.org/wiki/Migmatite

    Ptygmatic folding in migmatite on Naissaar Island, Estonia Migmatite on the coast of Saaremaa, Estonia Intricately-folded migmatite from near Geirangerfjord, Norway. Migmatite is a composite rock found in medium and high-grade metamorphic environments, commonly within Precambrian cratonic blocks.

  3. Pegmatite - Wikipedia

    en.wikipedia.org/wiki/Pegmatite

    Pegmatite with blue corundum crystals Pegmatite containing lepidolite, tourmaline, and quartz from the White Elephant Mine in the Black Hills, South Dakota Proterozoic pegmatite swarm in the headwall of the cirque of a small mountain glacier, northeastern Baffin Island, Nunavut

  4. Gangotri Glacier - Wikipedia

    en.wikipedia.org/wiki/Gangotri_Glacier

    Gangotri glacier (Sanskrit and Hindi: गंगोत्री) is located in Uttarkashi District, Uttarakhand, India in a region bordering Tibet.This glacier, one of the primary sources of the Ganges, has a volume of over 27 cubic kilometers. [1]

  5. Tectonic evolution of the Aravalli Mountains - Wikipedia

    en.wikipedia.org/wiki/Tectonic_evolution_of_the...

    The Aravalli Mountain Range in Rajasthan, India The Aravalli Mountain Range is in the northwestern part of India.. The Aravalli Mountain Range is a northeast-southwest trending orogenic belt in the northwest part of India and is part of the Indian Shield that was formed from a series of cratonic collisions. [1]

  6. Mohr's circle - Wikipedia

    en.wikipedia.org/wiki/Mohr's_circle

    Mohr's circle is a graphical representation used in engineering to visualize stress states in materials.

  7. Diastrophism - Wikipedia

    en.wikipedia.org/wiki/Diastrophism

    Diastrophism by 2011 Tohoku earthquake. Diastrophism is the process of deformation of the Earth's crust which involves folding and faulting.Diastrophism can be considered part of geotectonics.

  8. Overstep - Wikipedia

    en.wikipedia.org/wiki/Overstep

    An overstep is a geological form that has a deposition of a stratum across inclined, progressively older rocks. [1]The Indira Gandhi National Open University syllabus definition is: "The term overstep is used to describe the relationship of beds in an unconformable sequence where the younger series rests upon progressively older members of the underlying series."

  9. Ukrainian Shield - Wikipedia

    en.wikipedia.org/wiki/Ukrainian_shield

    In geology, the Ukrainian Shield or the Ukrainian Crystalline Massif is the southwest shield of the East European craton. It has an area of about 200,000 km 2 (77,000 sq mi) [ 1 ] and is approximately 1,000 km (620 mi) long and up to 250 km (160 mi) wide.