What is abrasion in a river?
GeologyAbrasion – When pebbles grind along the river bank and bed in a sand-papering effect. Attrition – When rocks that the river is carrying knock against each other. They break apart to become smaller and more rounded. What is an abrasion in geography? Abrasion – this is when pebbles grind along a rock platform, much
How is the use of radioactive decay in absolute dating similar to how you use a clock?
GeologyThe rate of decay for many radioactive isotopes has been measured and does not change over time. Thus, each radioactive isotope has been decaying at the same rate since it was formed, ticking along regularly like a clock. How is the use of radioactive decay in absolute dating similar to how U use a clock?
What are the parts of a volcano definition?
GeologyDefinitions. Magma – Molten rock beneath Earth’s surface. Parasitic Cone – A small cone-shaped volcano formed by an accumulation of volcanic debris. Sill – A flat piece of rock formed when magma hardens in a crack in a volcano. Vent – An opening in Earth’s surface through which volcanic materials escape. What are the parts
How did the Ozark Plateau form?
GeologyThe region is characterized by wooded, rolling hills formed by the erosion of an uplift called the Ozark Dome. Soils in the region, formed mostly from the weathering of carbonate rocks, support forests of oak, pine, and hickory. How did the Ozark Mountains form? The Ozarks were formed in a different way. They are the
Is Fernando Vargas still alive?
GeologyWhat happen to Fernando Vargas? Vargas, now 40, lives in Las Vegas and is married with four children. He is still involved in boxing, training two of his sons – both of whom are promising amateurs (“The legacy lives on,” said Vargas) as well as several pros. He has established the Fernando Vargas Fighting Foundation
What are the two mechanical layers of the earth?
GeologyMechanical Layers Layer Depth Lithosphere 0-100 km Asthenosphere 100-350 km Soft plastic *note: The mantle is not liquid! Mesosphere 350-2900km stiff plastic Outer Core 5100-6370 km solid What are earth’s 2 main layers? The Earth’s Structure The crust. This is the outside layer of the earth and is made of solid rock, mostly basalt and
What causes poorly sorted sediment?
GeologyStream deposits are usually poorly sorted because the energy (velocity) in a stream varies with position in the stream and time. Where is poorly sorted sediment found? At the end of a glacier, where ice is melting as fast as it is being supplied from upstream, the sediments are deposited in a terminal moraine, a
What has the biggest effect on the viscosity of lava?
GeologyTemperature: The hotter the lava, the lower the viscosity (the thinner it is). The cooler the lava, the higher the viscosity (the thicker it is). Composition: he more felsic the lava (the more silica in the lava), the higher the viscosity because silica forms chains in the cooling lava even before it crystallizes. What increases
Which mineral is found in rhyolite and andesite?
GeologyThe mineral assemblage is predominantly quartz, sanidine, and plagioclase. It is the extrusive equivalent to granite. Magma with the composition of rhyolite is extremely viscous, due to its high silica content.…Rhyolite. Composition Secondary Biotite and hornblende Which mineral can be found in all sample of rhyolite and andesite? Andesite is always rich in plagioclase, and
Where is tufa rock found?
GeologyTufa, the unusual rock formations that jut out of Mono Lake in California’s Eastern Sierra, are famous for their otherworldly beauty. The greatest concentration of these unique “towers” is located at the south end of the lake. In the photo above, the moon rises over one of the dark ivory towers. How does a tufa