When was the last major earthquake in Washington state?
Regional SpecificsFebruary 28, 2001February 28, 2001. When was the last big quake in Seattle? February 28, 2001 Today marks the 20th anniversary of the Washington’s last big earthquake, and there’s no forgetting it. On the morning of February 28, 2001, one of the earth’s tectonic plates cracked 35 miles below the Nisqually River delta, sending shock
What is Aphanitic texture in geology?
Regional SpecificsAphanitic – This texture describes very fine grained rock where individual crystals can be seen only with the aid of a microscope, i.e. the rock is mostly groundmass. An aphanitic texture is developed when magma is erupted at the Earth’s surface and cools too quickly for large crystals to grow. What is aphanitic form? aphanitic
How many volcanoes are on the island of Maui?
Natural EnvironmentsThe island of Maui is composed of two volcanoes, with a valley in the middle that forms a land bridge. The eastern volcano is Haleakala, a 10,000 foot shield volcano whose name means “House of the Sun”. Haleakala’s elevation means that it sometimes – briefly – has snow on top in the winter. How many
How do you prepare for an earthquake?
Regional SpecificsPrepare Before an Earthquake Make an Emergency Plan: Create a family emergency communications plan that has an out-of-state contact. Plan where to meet if you get separated. Make a supply kit that includes enough food and water for several days, a flashlight, a fire extinguisher and a whistle. How can we prepare for earthquakes? Six
What is the D layer of the Earth made of?
Regional SpecificsInner Core. The inner core is the deepest layer on Earth. It is also made up of iron and nickel but the pressure is so high that it is no longer liquid. What is the D layer of the Earth? The D” layer, the lowermost portion of the mantle, sits just above the molten iron-rich
What is the difference between the asthenosphere and the stiffer mantle?
Regional SpecificsWhat is the difference between asthenosphere and mantle? What is the difference between mantle and asthenosphere? Below the Moho, the mantle is characterized by peridotite, a rock mostly made up of the minerals olivine and pyroxene. The asthenosphere is the denser, weaker layer beneath the lithospheric mantle. What is the stiffer mantle? Stiffer Mantle. THE