When was the Washington monument damaged by an earthquake?
GeologyAugust 23, 2011August 23, 2011, a 5.8 magnitude earthquake, occurred 84 miles southwest of Washington, D.C., damaging the Washington Monument. The National Park Service has temporarily closed the Monument and is assessing the damage to it. When did the Washington Monument reopen after the earthquake? Sept. 19 Washington Monument, closed for five of the past
What causes convection currents in the atmosphere?
GeologyConvection currents are created in the Earth’s atmosphere as the sun heats the gases, causing them to rise. Theses gases cool as they rise high into the atmosphere and travel back down towards the ground to get heated again. What are the main causes of convection currents in the asthenosphere? Convection occurs in the asthenosphere
Is Dante’s Peak based on Mount St Helens?
GeologyThe volcanic inspiration for “Dante’s Peak” was the 1980 eruption of Mount St. Helens, which was used as a filming location for some scenes in the movie. “Dante’s Peak” is also strikingly similar to the 1981 movie “St. Helens,” which portrays a slightly dramatized story about the real event. Where is Dante’s Peak based? Dante’s
What are the three forces that cause plate motion?
GeologyConvection occurs in the mantle underneath Earth’s tectonic plates. Three forces act on the plates to make them move: basal drag from convection currents, ridge push at mid-ocean ridges, and slab pull from subducting plates. Convection currents in the mantle produce a force that causes motion called basal drag. What are three ways forces of
Is sand a product of weathering?
GeologyAfter a series of weathering cycles, sand-sized material will be produced and the grains continue to reflect the parent rocks. What are products of weathering? As weathering proceeds, they are likely to be broken into small pieces and converted into clay minerals and dissolved ions. Ultimately this means that quartz, clay minerals, iron oxides, aluminum
What are the characteristics of mafic rocks?
Geologymafic rock, in geology, igneous rock that is dominated by the silicates pyroxene, amphibole, olivine, and mica. These minerals are high in magnesium and ferric oxides, and their presence gives mafic rock its characteristic dark colour. What are the characteristics of felsic rocks? Felsic refers to silicate minerals, magma, and rocks which are enriched in
Where is Chalcedony found?
GeologyChalcedony: California; Iceland; India; Mexico; Namibia; Nevada; Oregon; Russia. Carnelian: Brazil; Egypt; India; Uruguay. Sard: Brazil; Uruguay. Bloodstone: Australia; Brazil; India; United States. Where do you find chalcedony? Chalcedony can be found in weathering volcanic rocks, but also in sedimentary ones, often together with agate. In igneous or metamorphic rocks chalcedony is very rare and
Can you use lava rock in a wood burning fire pit?
GeologyLava rocks are an exceptional choice when it comes to protecting wood burning fire pits. They provide a semipermeable barrier that is perfect for protecting the pit itself from the elements. It also makes the heat distribution more even. Can you burn lava rocks in wood burning fire pit? Yes, you can use lava rocks
What is formed when layers of turbidites accumulate?
GeologyAbyssal plains are formed by the accumulation of turbidites beyond the limits of deep-sea fans and abyssal cones in locations where there is a very large sediment supply. Where would a coral reef most likely be found? Corals are found all over the world’s oceans, from the Aleutian Islands off the coast of Alaska to
What type of rocks are those at Gubbio and why are they useful for studying the past?
GeologyWhat type of rocks are at Gubbio? Gubbio, located 200 kilometers northeast of Rome, is surrounded by olive- and vineyard-studded Apennine hills composed of a thick sequence of deformed marine limestones deposited on the floor of the ancient Tethys Sea. Why is the rock outside of Gubbio Italy found in layers? A thin layer of