Continental crust is part of the Earth’s surface found under land masses, and oceanic crust is the surface found under the ocean floor. Oceanic crust is made of dense rock like basalt. Continental crust has rocks of lesser density like granite.
The Earth has three different layers to it. The crust is the part of the Earth right on top where people live. The crust is subdivided into two types, oceanic and continental. Oceanic crust is found under oceans, and it is about four miles thick in most places. A feature unique to oceanic crust is that there are areas known as mid-ocean ridges where oceanic crust is still being created. Magma shoots up through gaps in the ocean’s floor here. As it cools, it hardens into new rock, which forms brand new segments of oceanic crust. Since oceanic crust is heavier than continental crust, it is constantly sinking and moving under continental crust.
Continental crust varies between six and 47 miles in thickness depending on where it is found. Continental crust tends to be much older than the oceanic kind, and rocks found on this kind of crust are often the oldest in the world. Examples of such rocks are those in Quebec, Canada which are estimated to be about 4 billion years old.Learn More
Metalloids do not conduct heat and electricity as well as metals, but otherwise, they display some of the properties of metals and some properties of nonmetals. The majority of all elements are metals, and metalloids are in between metals and nonmetals in terms of characteristics.Full Answer >
A tributary and a distributary are both bodies of freshwater that eventually meet with or diverge from rivers, but they differ in the direction that they flow. A tributary is a stream that flows into a larger river. A distributary is a stream or small river that splits off from a larger river and flows in a different direction.Full Answer >
According to The Geological Society, compaction occurs when sediments are buried underneath other layers causing them to stick together due to pressure. On the other hand, cementation occurs when new minerals act as binding agents that bind the sediments together. The main difference between the two processes is that compaction brings the sediments together, and cementation binds the sediment grains together.Full Answer >
According to Brooklyn College, cleavage occurs when a rock breaks along smooth planes that are parallel to areas in which the mineral has weak bonds. By contrast, rocks are said to fracture if they break irregularly, because the mineral does not form planes of weakness.Full Answer >