What best describes the Earth’s mantle?
GeologyThe mantle is the mostly-solid bulk of Earth’s interior. The mantle lies between Earth’s dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth’s total volume. Which best describes the mantle quizlet? Which statement BEST describes the Earth’s
What were the effects of Nevado del Ruiz?
GeologyThe lahars destroyed everything in their paths: roads, bridges, farm fields, aqueducts and telephone lines. They wiped out 50 schools, two hospitals and more than 5,000 homes. The region lost 60 percent of its livestock, 30 percent of grain and rice crops, and half a million bags of coffee.13 нояб. 1985 What happened when Nevado
What Sedimentary Rock would be formed by the compaction and cementation of rounded pebbles?
GeologyWhich sedimentary rock would be formed by the compaction and cementation of round pebbles? Conglomerate Conglomerate is a clastic sedimentary rock that forms the cementing of rounded cobble and pebble sized rock fragments. Which sedimentary rock is formed by compaction and cementation of sediments? After compaction and cementation the sedimentary sequence has changed into a
Can you build a house on Limestone?
GeologyLimestone has been used to help construct some of the most well known buildings in the world. It is one of the oldest, most versatile building materials available, and working with expert craftsmen can leave you with absolutely stunning additions. Can you use limestone to build? In terms of construction, limestone can be used in
What causes foliation in a metamorphic rock?
GeologyFoliation forms when pressure squeezes the flat or elongate minerals within a rock so they become aligned. These rocks develop a platy or sheet-like structure that reflects the direction that pressure was applied. What causes foliation to occur? Foliation is caused by the re-alignment of minerals when they are subjected to high pressure and temperature.
What are typical rates of seafloor spreading?
GeologyThese age data also allow the rate of seafloor spreading to be determined, and they show that rates vary from about 0.1 cm (0.04 inch) per year to 17 cm (6.7 inches) per year. Does seafloor spreading occur at the same rate? Seafloor spreading is mainly the result of convection currents dragging the ocean plate
What exactly is magma?
GeologyWhat is magma What is it made of? Magma is a molten and semi-molten rock mixture found under the surface of the Earth. This mixture is usually made up of four parts: a hot liquid base, called the melt; minerals crystallized by the melt; solid rocks incorporated into the melt from the surrounding confines; and
What type of earthquake generates a tsunami?
GeologyMost tsunamis are generated by earthquakes with magnitudes over 7.0 that occur under or very near the ocean and less than 100 kilometers (62 miles) below Earth’s surface (earthquakes deeper than this are unlikely to displace the ocean floor). What type of earthquake produces tsunamis? The earthquake must be a shallow marine event that displaces
Where can you find limonite?
GeologyLimonite is common and occurs within concretions and cavity fillings in sedimentary rocks and as coatings on the rocks, especially sandstone. It also occurs as iron rust and accumulates around rootlets in soils. Where can limonite be found? Limonite is a very common mineral and can be found throughout the world, with major deposits located
What type of rock created the first continents?
Geologyigneous protolithpartial melting of an older igneous protolith; however, both the composition of the protolith and its tectonic affinity are controversial. Field and analytical studies suggest that the early continents were formed by partial melting of oceanic crust in primitive subduction zones. What type of rock made the first continents? basalts The Earth’s oldest continental