What causes poorly sorted sediment?
Regional SpecificsStream 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?
Regional SpecificsTemperature: 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?
Regional SpecificsThe 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?
Regional SpecificsTufa, 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
How are the agents of weathering similar and different?
Regional SpecificsHow are the agents of weathering the different? Agents responsible for weathering include ice, salts, water, wind and plants and animals. Road salt and acids represent a form of chemical weathering, as these substances contribute to the wearing away of rocks and minerals as well. What are the similarities of weathering? Both weathering and erosion
What produces a reverse fault?
Regional SpecificsA tilted block that lies between two normal faults dipping in the same direction is a tilted fault block. Reverse dip-slip faults result from horizontal compressional forces caused by a shortening, or contraction, of Earth’s crust. The hanging wall moves up and over the footwall. What produces a reverse fault explain how? In a reverse