on April 15, 2022
What Colour is basalt rock?
Geologydark gray to blackdark gray to black color. Basalts are formed by the rapid cooling of basaltic lava, equivalent to gabbro-norite magma, from interior of the crust and exposed at or very close to the surface of Earth. These basalt flows are quite thick and extensive, in which gas cavities are almost absent. What does
on April 15, 2022
What are some features of the ocean floor?
GeologyFeatures of the ocean floor include the continental shelf and slope, abyssal plain, trenches, seamounts, and the mid-ocean ridge. The ocean floor is rich in resources. Living things on the ocean floor are used for food or medicines. Nonliving resources include oil, gas, and minerals. What are the 8 features of the ocean floor? There
on April 15, 2022
What is the scale for volcanic eruptions?
GeologyVolcanic Explosivity Index (VEI) is a numeric scale that measures the relative explosivity of historic eruptions. Volume of products, eruption cloud height, and qualitative observations (using terms ranging from “gentle” to “mega-colossal”) are used to determine the explosivity value. Is there a scale for volcanoes? The Volcanic Explosivity Index (VEI) is a scale that describes
on April 15, 2022
What is synclinal valley?
GeologyDefinition of synclinal valley : a valley produced by or coinciding in position with a synclinal fold. What is the meaning of synclinal? Definition of synclinal 1 : inclined down from opposite directions so as to meet. 2 : having or relating to a folded rock structure in which the sides dip toward a common
on April 15, 2022
What is the parent rock of phyllite?
GeologyPhyllite Type Metamorphic Rock Miscellaneous Foliation surface has a satiny sheen and crinkled appearance Metamorphic Type Regional Metamorphic Grade Low Grade (Higher than Slate) Parent Rock Shale or Mudstone What rock does phyllite form from? metamorphic rock phyllite, fine-grained metamorphic rock formed by the reconstitution of fine-grained, parent sedimentary rocks, such as mudstones or shales.
on April 15, 2022
Do strike slip faults cause tsunamis?
GeologyStrike-slip faults are not usually included in tsunami hazard assessments as they generally cause large horizontal (with limited vertical) displacements, and so are considered insufficient to generate large tsunamis unless they trigger a submarine landslide. Do tsunamis occur on strike-slip faults? Strike-slip faulting has generally been considered insufficient for triggering large tsunamis, except through the
on April 15, 2022
How often does Washington State get earthquakes?
GeologyWashington, especially the Puget Sound basin, has a history of frequent earthquakes. More than 1,000 earthquakes occur in the state each year. A dozen or more are strong enough that people feel ground shaking. When was the last time Washington State had an earthquake? The most recent major earthquake, the Nisqually quake, was a magnitude
on April 15, 2022
Which types of soil are susceptible to liquefaction in an earthquake?
GeologyPoorly drained fine-grained soils such as sandy, silty, and gravelly soils are the most susceptible to liquefaction. Granular soils are made up of a mix of soil and pore spaces. When earthquake shock occurs in waterlogged soils, the water-filled pore spaces collapse, which decreases the overall volume of the soil. What areas are susceptible to
on April 15, 2022
How do you clean white marble rocks?
GeologyHow do you get white rocks white again? Mix a solution of 1 cup of white vinegar and 6 cups of water and apply it to the rocks. Use a scrubbing brush to remove the growth. Rinse them clean with a hose and repeat if necessary. How do you clean white marble gravel? In a
on April 15, 2022
What plate boundary is Mount Merapi on?
Geologysubduction zonedestructive plate margin , at a subduction zone, part of the Pacific Ring of Fire. What type of plate boundary is Mount Merapi on? subduction zone Tectonically, Merapi is situated at the subduction zone where the Indo-Australian Plate is sliding beneath the Eurasian Plate. It is part of the Pacific Ring of Fire –