Posted on April 17, 2022 (Updated on July 9, 2025)
Is it safe to buy a home with a repaired sinkhole?
Regional SpecificsIn general, if a repair has been certified by a licensed engineer and completed to the satisfaction of the homeowner’s insurance company, it is likely safe. However, since these are natural systems, there can be no guarantees that a repaired sinkhole will not cause future problems. How long does it take to recover from a
Posted on April 17, 2022 (Updated on July 9, 2025)
How many buildings were destroyed in the Northridge earthquake?
Regional SpecificsThe 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
Posted on April 17, 2022 (Updated on July 9, 2025)
What is the process of attrition?
Regional SpecificsDefinition: 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
Posted on April 17, 2022 (Updated on July 9, 2025)
Is Sandstone well sorted or poorly sorted?
Regional SpecificsExamples 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
Posted on April 17, 2022 (Updated on July 9, 2025)
When did San Francisco Peaks last erupt?
Regional Specifics940 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
Posted on April 17, 2022 (Updated on July 9, 2025)
What is absolute dating for kids?
Regional SpecificsWith 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.