on April 16, 2022
How does water shape the earth?
GeologyWater moving across the earth in streams and rivers pushes along soil and breaks down pieces of rock in a process called erosion. The moving water carries away rock and soil from some areas and deposits them in other areas, creating new landforms or changing the course of a stream or river. How does water
on April 16, 2022
How much damage did the Anchorage earthquake cause?
GeologyThe four minute duration of shaking triggered many landslides and avalanches. Major structural damage occurred in many of the major cities in Alaska. The damage totalled 300-400 million dollars (1964 dollars). The number of deaths from the earthquake totalled 131; 115 in Alaska and 16 in Oregon and California. How strong was the earthquake in
on April 16, 2022
What was the worst earthquake in US history?
GeologyThe Largest Earthquakes in the United States RANK MAGNITUDE DATE 1. 9.2 March 28, 1964 2. 8.8 March 9, 1957 3. 8.7 Feb. 4, 1965 4. 8.3 Nov. 10, 1938 What are the 5 largest earthquakes ever recorded in USA? 5 of the most devastating earthquakes in US history Charleston, South Carolina 1886. Northridge, California
on April 16, 2022
What period did Ammonite live in?
GeologyJurassicJurassic and Cretaceous. Together, these represent a time interval of about 140 million years. The Jurassic Period began about 201 million years ago and the Cretaceous Period ended about 66 million years ago. Did ammonites live in the Mesozoic Era? Evolution and extinction As ammonites evolved throughout the Mesozoic era, between 252 and 66 million
on April 16, 2022
When did the Columbia River basalts form?
Geologyabout 17 million years agoabout 17 million years ago. How old is the Columbia River Basalt? 16.7 million years old The Columbia River Basalts (CRBs) are a series of broad lava flows known as flood basalts . The CRBs currently cover large portions of southeast Washington, northeast Oregon and western Idaho. At 16.7 million years
on April 16, 2022
What was the cause of the Great Hanshin Earthquake?
GeologyThe great Hanshin earthquake was caused by plate motion under Hanshin area. The inland shallow earthquake type decides its severe damage to cities such as Kobe and Osaka, by both shocking waves and soil liquification. What plates caused the Great Hanshin Earthquake? The Kobe quake was a result of an east-west strike-slip fault where the
on April 16, 2022
What are the characteristics of a clastic sedimentary rock?
GeologyClastic sedimentary rocks are named according to the characteristics of clasts (rock and mineral fragments) that comprise them. These characteristics include grain size, shape, and sorting. How do you identify a clastic sedimentary rock? Clastic sedimentary rocks are subdivided on the basis of grain size. Secondary characteristics used to further distinguish clastic rocks are sorting,
on April 16, 2022
Where is Galena found in the world?
GeologyGalena deposits are found in France, Romania, Austria, Belgium, Italy, Spain, Scotland, England, Australia, and Mexico. Noted deposits include those at Freiberg, Saxony; Cornwall, Derbyshire, and Cumberland, England; the Sullivan mine of British Columbia; and Broken Hill, Australia. Is Galena rare on Earth? Galena is a rare mineral in some granitic pegmatites. It is also
on April 16, 2022
How does Magma turn into extrusive igneous rock?
GeologyExtrusive Igneous Rocks: Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth’s surface. These are the rocks that form at erupting volcanoes and oozing fissures. What is the example of extrusive igneous rock? Types of extrusive igneous rocks include: pumice, obsidian, andesite, rhyolite, and basalt. What
on April 16, 2022
What is the difference between a rockslide and a slump?
GeologyA slump can form when the base of a mountain slope or hillside is eroded away by water or cut away during construction. A rockslide is the sliding of rock material down a mountain. How is a slump different from a rockfall? As nouns the difference between rockfall and slumping is that rockfall is a