on April 16, 2022
What is the density of oceanic crust?
Geology3.0 g/cm33.0 g/cm3, while continental crust has an average of 2.7 g/cm3. Is oceanic crust high density? Oceanic crust is more dense because it contains basalt which is more dense than granite which composes the continental crust. … Subduction is when one plate is forced below the other due to its higher density. What is
on April 16, 2022
How do I make my porcelain sink hole wider?
GeologyYou can use one of two methods to make the hole wider in a porcelain sink. You can use a grinder to wear down the porcelain, or you can use a diamond grit hole saw to cut a new hole. The hole saw is definitely faster, but it’s a little riskier because it generates more
on April 16, 2022
What formed the Columbia Plateau?
GeologyThe plateau formed between 6 million and 16 million years ago as the result of successive flows of basalt. Its northern border is marked by the Columbia River and the mouth of the Okanagon River. On the south, the plain includes the drainage of the Deschutes River in Oregon. What volcano formed the Columbia Plateau?
on April 16, 2022
How are turbidites formed?
GeologyTurbidites are sea-bottom deposits formed by massive slope failures. Rivers flowing into the ocean deposit sediments on the continenal shelf and slope. How are turbidites formed and why are they geologically important? Turbidites provide a mechanism for assigning a tectonic and depositional setting to ancient sedimentary sequences as they usually represent deep-water rocks formed offshore
on April 16, 2022
What are the 3 major island arcs?
GeologySome well-known examples of island arcs are Japan, Aleutian Islands of Alaska, Mariana Islands, all of which are in the Pacific, and the Lesser Antilles in the Caribbean. The abundance of volcanic rocks around the Pacific Ocean has led to the designation of the Pacific margin as a “Ring of Fire”. What is the most
on April 16, 2022
How far out does the continental shelf extend?
Geology200 nautical miles200 nautical miles,” whichever is further. How far does continental shelf extend? A continental shelf typically extends from the coast to depths of 100–200 metres (330–660 feet). It is gently inclined seaward at an average slope of about 0.1°. In nearly all instances, it ends at its seaward edge with an abrupt drop
on April 16, 2022
What is a fossil record?
Geologyfossil record, history of life as documented by fossils, the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock. What is a fossil record and what does it do? The fossil record helps paleontologists, archaeologists, and geologists place important events and species in the appropriate geologic era. It is based on
on April 16, 2022
What are the different types of seismic waves?
GeologyThere are three basic types of seismic waves – P-waves, S-waves and surface waves. P-waves and S-waves are sometimes collectively called body waves. What are the 4 types of seismic waves? Love Waves—surface waves that move parallel to the Earth’s surface and perpendicular to the direction of wave propagation.. P-wave Motion. P-wave:the primary body wave;
on April 16, 2022
What is the difference between a fossil of a plant or organism and a trace fossil of an animal?
GeologyBody Fossils and Trace Fossils The fossils of bones, teeth, and shells are called body fossils. Most dinosaur fossils are collections of body fossils. Trace fossils are rocks that have preserved evidence of biological activity. They are not fossilized remains, just the traces of organisms. What is the difference between an animal and a trace
on April 16, 2022
Which is the best evidence supporting the concept of seafloor spreading?
GeologySupporting Evidence for Seafloor Spreading First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge. What are the evidence that supports the theory of seafloor spreading? Harry Hess’s hypothesis about seafloor spreading