on April 15, 2022
What was the magnitude of the Alaska earthquake in 1964?
Regional Specificsmagnitude 9.2magnitude 9.2 (moment magnitude) occurred in the Prince William Sound region of Alaska. How long did the 1964 Great Alaskan earthquake last? approximately 4.5 minutes The earthquake lasted approximately 4.5 minutes and is the most powerful recorded earthquake in U.S. history. It is also the second largest earthquake ever recorded, next to the M9.
on April 15, 2022
Why have some open pit mines been declared Superfund sites?
Regional SpecificsWhy have some open pit mines been declared Superfund sites? The waters in the pit become highly acidic and contain high levels of toxic metals. The toxic waters of the Berkeley Pit make it one of the largest Superfund sites in the country. What are the causes of acid mine drainage? Acid mine drainage is
on April 15, 2022
What happened in the Paleocene epoch?
Regional SpecificsPaleocene Epoch (65.5 – 55.8 MYA) The Paleocene epoch immediately followed the extinction of the dinosaurs. The Earth’s climate was warmer than today, but cooler and drier than the epochs immediately preceding and following it. Europe and North America were connected, as were Asia and North America at times. What major events happened in the
on April 15, 2022
How do fossils show evidence?
Regional SpecificsFossils provide solid evidence that organisms from the past are not the same as those found today; fossils show a progression of evolution. Scientists determine the age of fossils and categorize them all over the world to determine when the organisms lived relative to each other. How do fossils demonstrate evidence? Fossils are the preserved
on April 15, 2022
Where is dolostone found?
Regional SpecificsAlthough rock beds containing dolomite are found throughout the world, the most notable quarries are located in the Midwestern United States; Ontario, Canada; Switzerland; Pamplona, Spain; and Mexico. How is dolostone formed? Dolostone forms when magnesium in pore water is substituted for some of the calcium in the original limestone, or by direct precipitation. Most
on April 15, 2022
Which magma type has the highest silica content?
Regional SpecificsFelsic magmaFelsic magma has the highest silica content of all magma types, between 65-70%. As a result, felsic magma also has the highest gas content and viscosity, and lowest mean temperatures, between 650o and 800o Celsius (1202o and 1472o Fahrenheit). Which magma type has the highest silica content quizlet? RHYOLITIC magma contains more than 65%