on March 31, 2022
What type of rock is gneiss?
Geologygneiss, metamorphic rock that has a distinct banding, which is apparent in hand specimen or on a microscopic scale. Gneiss usually is distinguished from schist by its foliation and schistosity; gneiss displays a well-developed foliation and a poorly developed schistosity and cleavage. What type of metamorphic rock is gneiss? Gneiss is a high grade metamorphic
on March 30, 2022
How does weathering shape the earth’s surface?
GeologyThe effects of weathering disintegrate and alter mineral and rocks near or at the earth’s surface. This shapes the earth’s surface through such processes as wind and rain erosion or cracks caused by freezing and thawing. Each process has a distinct effect on rocks and minerals. How does weathering changes the shape of the earth?
on March 30, 2022
How can we use volcano?
Geology6 ways volcanoes benefit Earth, our environment Atmospheric cooling. … Land formation. … Water production. … Fertile land. … Geothermal energy. … Raw materials. What can volcano be used for? They helped cool off the earth removing heat from its interior. Volcanic emissions have produced the atmosphere and the water of the oceans. Volcanoes make
on March 30, 2022
What is Eyjafjallajokull and what did it cause?
GeologyEyjafjallajokull is located below a glacier. The Eyjafjallajökull volcano erupted in 920, 1612 and again from 1821 to 1823 when it caused a glacial lake outburst flood (or jökulhlaup). It erupted three times in 2010—on 20 March, April–May, and June. The March event forced a brief evacuation of around 500 local people. What was the
on March 30, 2022
How do earthquakes predict volcanic eruptions?
GeologyEarthquakes. Moving magma shakes the ground, so the number and size of earthquakes increases before an eruption. A volcano that is about to erupt may produce a sequence of earthquakes. Scientists use seismographs that record the length and strength of each earthquake to try to determine if an eruption is imminent. How do we predict
on March 29, 2022
What 3 factors determine the characteristics of sedimentary rock?
GeologyWhat three factors determine the characteristics of sedimentary rocks? The source of sediment, the way sediment was moved and the conditions that sediment was deposited. How are newly formed sediments transported to new locations? They are transported by wind, water or ice. What 3 characteristics determine the type of sedimentary rock? Clastic sediments or sedimentary
on March 29, 2022
What minerals are in rock dust?
GeologyRock dust (also called rock flour or rock mineral powder) is exactly what it sounds like.…This means the mineral content varies considerably, but in general rock dusts contain: Large amounts of silicon, aluminum, and sometimes iron. Lesser amounts of calcium, copper, magnesium, manganese, potassium, sulfur, and zinc. Which rock dust is best? Basalt is a
on March 29, 2022
What tectonic plate is Pakistan on?
GeologyPakistan is split along the boundary between the Eurasian and Indian plates where the India plate slides northward relative to the Eurasia plate in the east. Is Pakistan on the Indian tectonic plate? Pakistan geologically overlaps both with the Indian and the Eurasian tectonic plates where its Sindh and Punjab provinces lie on the north-western
on March 29, 2022
What are the 4 ways plates move?
GeologyWhat are the major plate tectonic boundaries? Divergent: extensional; the plates move apart. Spreading ridges, basin-range. Convergent: compressional; plates move toward each other. Includes: Subduction zones and mountain building. Transform: shearing; plates slide past each other. Strike-slip motion. What are the 4 plate boundaries? There are four main types of plate boundary. These are constructive,
on March 29, 2022
What is isotopic dating used for?
GeologyRadioactive dating is a method of dating rocks and minerals using radioactive isotopes. This method is useful for igneous and metamorphic rocks, which cannot be dated by the stratigraphic correlation method used for sedimentary rocks. Over 300 naturally-occurring isotopes are known. What does isotopic dating deal with? Isotopic dating of rocks, or the minerals in