on April 1, 2022
What causes a mudflow?
Regional SpecificsMudflows can be caused by unusually heavy rains or a sudden thaw. They consist mainly of mud and water plus fragments of rock and other debris, so they often behave like floods. They can move houses off their foundations or bury a place within minutes because of incredibly strong currents. Where do mudflows commonly happen?
on April 1, 2022
How do you find the porosity of a well log?
Regional SpecificsThe most common method of determining porosity is with Well Logs.… ϕsl is the porosity from the sonic log (log measurement) , fraction. Δtsl is value of the acoustic transit time measured by the sonic log, μsec/ft. Δtma is value of the acoustic transit time of the rock matrix measured in the laboratory, μsec/ft. What
on April 1, 2022
What weathering effects granite?
Regional SpecificsWhat weathering forms cracks in granite? Blocks are boulders formed through the process of mechanical weathering. Solid rock, like this granitic outcrop on Mount San Jacinto in southern California, fractures into blocks by forces of mechanical weathering. Every day, water seeps into cracks in the granite. Every night the cracks expand as the water freezes.
on April 1, 2022
Is mafic lava explosive?
Regional SpecificsIn general, the more felsic the magma the greater the volatile content. So mafic/basaltic volcanoes are fairly quiescent, intermediate/andesitic volcanic eruptions are moderately explosive, and felsic/rhyolitic volcanoes may be extremely explosive. What are the 5 types of volcanic eruptions? Types of eruptions Hydrothermal eruption. An eruption driven by the heat in a hydrothermal systems. …
on April 1, 2022
Why do tectonic plates move GCSE?
Regional SpecificsOne explanation for plate movements is slab pull. Plates are extremely heavy so gravity acts upon them, pulling them apart. Alternatively, as shown in the diagram, convection currents under the Earth’s crust transfer heat, which rises through the surface and cools back down in a circular motion. Why do tectonic plates have to move? The
on April 1, 2022
What is the highest rank of sedimentary coal?
Regional SpecificsThe four ranks are: Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite. What is the highest