When was the last big earthquake in San Diego?
GeologyA magnitude 7.1 earthquake struck 10.5 miles north-northwest of Ridgecrest in the Mojave Desert on Friday, July 5, 2019, at 8:19 p.m., on the heels of a magnitude 6.4 earthquake that struck about 7.5 miles southwest of the Searles Valley in the Mojave Desert on Thursday, July 4, 2019, at 10:33 a.m. What was the
What is an outcrop pattern?
GeologyGeologic maps show where various rock units and structures lie at the earth’s surface. Because many of these structures are planar, or approximately planar features, they interact with topography in predictable ways. Flat-lying Beds. What is outcrop in geological map? An outcrop or rocky outcrop is a visible exposure of bedrock or ancient superficial deposits
What are the 4 properties of sedimentary rocks?
GeologyFour basic processes are involved in the formation of a clastic sedimentary rock: weathering (erosion)caused mainly by friction of waves, transportation where the sediment is carried along by a current, deposition and compaction where the sediment is squashed together to form a rock of this kind. What are the main properties of sedimentary rock? Sedimentary
Can anything survive lava?
GeologyANSWER : There are many materials that can withstand these temperatures: from metals such as (nickel alloys, iron alloys, tungsten and molybdenum alloys, even though these two might have oxidation issues, iridium, osmium, titanium, etc) to ceramics (silicon nitride, aluminum oxide, mullite, zirconia, etc). Can any animal survive in lava? A curious variety of animals
What is an example of a butte?
GeologyAmong the well-known non-flat-topped buttes in the United States are Bear Butte, South Dakota, Black Butte, Oregon, and the Sutter Buttes in California. What is a butte Mountain? Buttes are smaller flat topped mountains or hills with steep slopes on all sides. They are typically topped by a hard cap rock that is resistant to
Where are ammonites fossils found?
Geologymarine sedimentary rocksmany types of marine sedimentary rocks. Where are Ammolite fossils Found? Sources. Ammolite is only found in the Bearpaw Formation, which extends from Alberta to Saskatchewan in Canada and south to Montana in the US. The best gem-quality ammolite is found along high-energy river systems on the eastern slopes of the Rocky Mountains
What is the size of a grain?
GeologyWhat is the size of the grain? Grain size (or particle size) is the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials. This is different from the crystallite size, which refers to the size of a single crystal inside a
How was the time scale and its divisions created?
GeologyThe time scale was developed through the study and observation of layers of rock and relationships as well as the times when different organisms appeared, evolved and became extinct through the study of fossilized remains and imprints. How was the time scale created? The geologic time scale was developed after scientists observed changes in the
What did Hutton and Lyell discover?
GeologyJames Hutton. Along with Charles Lyell, James Hutton developed the concept of uniformitarianism. He believed Earth’s landscapes like mountains and oceans formed over long period of time through gradual processes. What did Hutton and Lyell discover about Earth’s history? Hutton and Lyell concluded that the Earth is extremely old and that the processes that changed
What happens at a destructive plate boundary?
GeologyAt a destructive plate boundary (also called convergent boundaries) two plates move towards another. One plate is then pushed underneath the other. (It is the heavier plate that is forced beneath the lighter plate). The point at which one plate is forced beneath the other is called the subduction zone. What happens at a destructive