How many volcanoes are on the island of Maui?
Geology and GeographyThe 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?
GeologyPrepare 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?
GeologyInner 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
Which aspects of the environment are biophysical elements?
GeologyThe biophysical environment is made up of four parts: the atmosphere, hydrosphere, lithosphere and biosphere. The atmosphere includes gases that are around the earth and everything that happens in them, such as heat from the sun, weather, smog and haze, climate and acid rain. What are the types of biophysical environment? The biophysical environment can
What is the difference between the asthenosphere and the stiffer mantle?
GeologyWhat 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
When did the Phanerozoic eon begin?
Geologyapproximately 541.0 million years agoapproximately 541.0 million years ago. It is predated by the Precambrian eons. The Phanerozoic began with the Cambrian Explosion, which was the massive biodiversification of multicellular organisms that developed in the late Precambrian. When did the Phanerozoic begin when did it end? Phanerozoic Eon, the span of geologic time extending about
What type of fossils are found in Virginia?
GeologyPelecypods, also called bivalves, are soft-bodied animals that secrete a hard shell with two sides, such as an oyster or clam. Pelecypods are abundant in the Cenozoic sedimentary deposits of Virginia’s Coastal Plain. Virginia’s state fossil is the bivalve Chesapecten jeffersonius, pictured here. What are most of the fossils found in Virginia of? Fossils can
What are the three laws of relative dating?
GeologyThe Principle of Original Horizontality states that all rock layers were originally horizontal. The Law of Superposition states that younger strata lie on top of older strata. The Principle of Cross-Cutting Relationships states that intrusions and faults that cut across rock are necessarily younger than that rock. What are the 3 basic principles of relative
What type of lava does a composite volcano have?
GeologyAcidic lavaAcidic lava, which is very viscous (sticky). Steep sides as the lava doesn’t flow very far before it solidifies. Alternate layers of ash and lava. What type of lava flow does a composite volcano have? Stratovolcanoes show interlayering of lava flows and typically up to 50 percent pyroclastic material, which is why they are
What rocks are devoid of fossils?
GeologyIgneous rocks form from molten rock, and rarely have fossils in them. Metamorphic rocks have been put under great pressure, heated, squashed or stretched, and fossils do not usually survive these extreme conditions. Which rock is devoid of fossils which hinders correlation of rocks? Most Mesozoic rocks are devoid of fossils; consequently this is the