on April 17, 2022
What came after the Precambrian era?
GeologyAn era of geologic time, from the end of the Precambrian to the beginning of the Mesozoic. The word Paleozoic is from Greek and means “old life.” The final period of the Paleozoic era. It is named after the province of Perm, Russia, where rocks of this age were first studied. What are the 3
on April 17, 2022
How big are the earth layers?
GeologyCrust – 5 to 70 km thick. Mantle – 2,900 km thick. Outer Core – 2,200 km thick. Inner Core – 1,230 to 1,530 km thick. How thick is the earths crust? Beneath the oceans, the crust varies little in thickness, generally extending only to about 5 km. The thickness of the crust beneath continents
on April 17, 2022
What makes a slope stable?
GeologySlope stability is ultimately determined by two factors: the angle of the slope and the strength of the materials on it. How do you know if a slope is stable? If the forces that resist the movement are greater than those driving the movement, the slope is considered stable. A factor of safety (FS) is
on April 17, 2022
What is pyrite concrete?
GeologyWhat is pyrite? Pyrite is a mineral composed of iron sulphide that may be contained in the backfill material (crushed stone) under a concrete slab of a basement or garage. What is pyrite used for in construction? Pyrite and pyrrhotite in aggregates and concrete Aggregates, such as sand, gravel, crushed stone, or other rocky material,
on April 17, 2022
What is a plateau answer?
GeologyA plateau is a flat, elevated landform that rises sharply above the surrounding area on at least one side. Plateaus occur on every continent and take up a third of the Earths land. They are one of the four major landforms, along with mountains, plains, and hills. What is a plateau called? plateaus or plateaux),
on April 17, 2022
How long after tsunami does water recede?
GeologyWhen this happens, the ocean first draws down and sucks water away from the coastlines. Then it rushes back in with enormous speed and force when the waves arrive. People who notice the receding water have as little as 5 minutes to flee inland to higher ground. Does the water recede after a tsunami? The
on April 17, 2022
When was the last time Iztaccihuatl erupted?
GeologyIs Iztaccíhuatl volcano still active? The dormant volcano Iztaccíhuatl lies on the Puebla-México border; the highest of its three peaks reaches 17,159 feet (5,230 metres). When was the most recent eruption of Popocatépetl? The active volcano Popocatépetl – just 43 miles (70 km) southeast of Mexico City, and visible from there when atmospheric conditions permit
on April 17, 2022
Where is Lake Missoula?
GeologyMontanaabout 110 kilometres (68 mi) northwest of Missoula, Montana, at the north end of the Camas Prairie Valley, just east of Montana Highway 382 and Macfarlane Ranch. What was the story around Glacial Lake Missoula? The Short Story Glacial Lake Missoula formed as the Cordilleran Ice Sheet dammed the Clark Fork River just as it
on April 17, 2022
What fault was the 1989 earthquake?
GeologyThe epicenter was on the San Andreas fault roughly 56 miles south of San Francisco and 10 miles northeast of Santa Cruz, near Mt. Loma Prieta in the Santa Cruz Mountains. What type of fault caused the 1989 earthquake? the San Andreas Fault Caused by a slip along the San Andreas Fault, the quake lasted
on April 17, 2022
Where does the book ashfall take place?
GeologyIn this grim, postapocalyptic tale, the Yellowstone supervolcano erupts, covering much of North America in volcanic ash and plunging the world into nuclear winter. Fifteen-year-old Alex Halprin refused a family trip to visit relatives in Illinois, so he’s home alone in Iowa when the eruption occurs. What is the plot of the book Ashfall? Summary: