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.Know More
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 about Geology
Sandstone forms over the course of centuries, as deposits of sand accumulate in rivers, lakes or on the ocean floor, and the sand blends with calcite or quarts and then undergoes compression. After enough time goes by, the pressure pushes all of these elements together to create sandstone. Because not all sand is identical but instead comes in a variety of colors and grain textures, each formation has a unique appearance.Full Answer >
The youngest part of the ocean floor is always found around mid-ocean ridges or other magma vents. The ocean floor moves up from the new earth developed at the edges of the continental plates.Full Answer >
The Vishnu schist is part of the Vishnu complex in the exposed basement rocks of the Grand Canyon region. This metamorphic layer was formed by the intrusion of plutonic masses from under the crust and the deposit of sediment from an eroded mountain chain.Full Answer >
The outer core is part of the core, which is one of the three major layers of the Earth. The core is the deepest and hottest layer and is mostly composed of metals, and it is beneath the Earth's mantle. The outer core is the first layer of the core, and it extends to a depth of approximately 2,890 kilometers below the Earth's crust and measures 2,300 kilometers thick.Full Answer >