How do continental glaciers and valley glaciers affect the land?
GeologyA glacier’s weight, combined with its gradual movement, can drastically reshape the landscape over hundreds or even thousands of years. The ice erodes the land surface and carries the broken rocks and soil debris far from their original places, resulting in some interesting glacial landforms. What are 2 ways that glaciers affect the land? Glaciers
Why is plate tectonics a theory?
GeologyPlate tectonics is a theory because it provides an explanation of why and how segments of the earth move and cause earthquakes and mountains and volcanos. Is plate tectonics a theory or fact? Plate tectonics is the theory that Earth’s land masses are in constant motion. The realization that Earth’s land masses move was first
How much lava is in Yellowstone?
GeologyThe chamber is mostly solid, with only about 5-15% melt. The deeper reservoir is composed of basalt (a low-silica rock type) and extends from 20 to 50 km (12 to 30 mi) beneath the surface. Even though the deeper chamber is about 4.5 times larger than the shallow chamber, it contains only about 2% melt.
What is the difference between basalt and andesite?
GeologyIt has less than 20% quartz and 10% feldspathoid by volume, with at least 65% of the feldspar in the rock consisting of plagioclase. This places andesite in the basalt/andesite field of the QAPF diagram. Andesite is further distinguished from basalt by its silica content of over 52%. How are basalt and andesite related? Andesite
What is the types of fossils?
GeologyThere are five types of fossils: Body Fossils. Molecular Fossils. Trace Fossils. Carbon Fossils. Pseudofossils. What are 3 types of fossil? Scientists categorize fossils into three main groups – impression fossils, trace fossils, and replacement fossils.The 3 Types of Fossils Impression fossils. These fossils contain prints, or impressions, of plants or animals from long ago.
What was the worst earthquake in history?
GeologyGreat Alaska Earthquake (1964)– 9.2 It lasted approximately 4.5 minutes and is the most powerful recorded earthquake in U.S. history. The earthquake triggered 27-foot (8.2 meters) tsunami which destroyed the village of Chenega, killing 23 of the 68 people who lived there. Has there ever been a 10.0 earthquake? No, earthquakes of magnitude 10 or
How did Hope BC get its name?
GeologyHope was established 1848-49 as a Hudson’s Bay Company post at the western end of its Brigade Trail from Fort Kamloops (see KAMLOOPS), and was so named in the hope that this trail would provide an all-British route between forts Kamloops and LANGLEY. What is Hope BC known? Visitors can also take a self-guided tour
What does siltstone feel like?
GeologyWe cannot see the difference between these rocks, but it turns out that siltstone feels gritty when nibbled or rubbed against a tooth whereas claystones feel smooth. If you find a claystone, you know that it accumulated in a very quiet environment with almost still water. What is the texture of siltstone? Siltstone Type Sedimentary
What areas are susceptible to liquefaction?
GeologyThe highest hazard areas are concentrated in regions of man-made landfill, especially fill that was placed many decades ago in areas that were once submerged bay floor. Such areas along the Bay margins are found in San Francisco, Oakland and Alameda Island, as well as other places around San Francisco Bay. How do you know
What type of dating uses the law of superposition?
GeologyThe Law of Superposition, which states that older layers will be deeper in a site than more recent layers, was the summary outcome of ‘relative dating‘ as observed in geology from the 17th century to the early 20th century. Is the law of superposition absolute dating? Geologists use the law of superposition to determine the