How many buildings were destroyed in the Northridge earthquake?

The Northridge earthquake caused at least 57 deaths and over 9,000 injuries. Some 125,000 people were made at least temporarily homeless. What was the damage to buildings and structures? 82,000 residential and commercial units and 5,400 mobile homes were damaged or destroyed. How much property damage did the Northridge earthquake cause? The Northridge quake was

What is the process of attrition?

Definition: Attrition is an erosional process. Rocks and pebbles are carried in the flow of a river. They repeatedly knock into each other, which causes the rocks to erode or to break. As the rocks continue to collide, they erode more and more, getting smaller and smaller until they are only sediment. What is the

Is Sandstone well sorted or poorly sorted?

Examples of well-sorted sediment include quartz sandstones (see the 2nd diagram above – rounded, well-sorted) and shales (3rd diagram, angular well-sorted). Is sandstone a well sorted rock? Mature sandstones are clay-free, and the sand grains are subangular, but they are well sorted—that is, of nearly uniform particle size. Is sandstone an example of a poorly

When did San Francisco Peaks last erupt?

940 years agosome 940 years ago; there will be more eruptions in the SF Volcanic Field in the future. How often do volcanic eruptions occur in San Francisco? On average, eruptions have occurred every 10,000 years. Is the San Francisco Volcanic Field active? Small volume basaltic lava fields like the San Francisco field erupt infrequently

What is absolute dating for kids?

With absolute age dating, you get a real age in actual years. It’s based either on fossils which are recognized to represent a particular interval of time, or on radioactive decay of specific isotopes. First, the fossils. What is absolute dating short answer? Geologists often need to know the age of material that they find.

What are sedimentary rocks made of?

Clastic sedimentary rocks are made up of pieces (clasts) of pre-existing rocks. Pieces of rock are loosened by weathering, then transported to some basin or depression where sediment is trapped. If the sediment is buried deeply, it becomes compacted and cemented, forming sedimentary rock. How are sedimentary rocks formed short answer? Sedimentary rocks are formed

What are valley glaciers?

Valley glaciers Commonly originating from mountain glaciers or icefields, these glaciers spill down valleys, looking much like giant tongues. Valley glaciers may be very long, often flowing down beyond the snow line, sometimes reaching sea level. What is an example of valley glacier? The Fraser Glacier (Glacier Bay National Park, Alaska) is a valley glacier,

What minerals form by sublimation?

Sulfur and cristobalite are examples of minerals that may form by sublimation. Snow flakes and frost on the window would be another. What are 3 uses for minerals Uwaterloo? Quartz is one of the most abundant minerals on the planet.Used in: Watches. Gemstones. A source of silica for glass. Electrical components. Optical lenses. Sandpaper. What

What is a granite boulder?

Blasted Granite is a striking boulder that will make a powerful statement in most any application. : Gray and White. Landscape Boulder Options. The cornerstone of landscape design, boulders are large landscape rocks that are at least a foot across and can weigh 165lbs per cubic foot. What does boulder stone mean? Noun. boulderstone (plural

What is structure of the earth?

What is the structure of Earth? The structure of the earth is divided into four major components: the crust, the mantle, the outer core, and the inner core. Each layer has a unique chemical composition, physical state, and can impact life on Earth’s surface. What is the 3 structure of the earth? Earth’s interior is

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