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What do we call the sudden slipping of rocks beneath the earth's surface?
earthquake
What processes found at a divergent boundary help form the following rocks?
The process of upwelling magma is found a divergent boundaries. As this magma nears the surface it decompresses, and some of it flows onto the surface of the Earth as lava. Magma that solidifies beneath the surface of the Earth hardens into gabbro while lava on the surface of the Earth hardens into basalt. Both of these are igneous rocks. Metamorphic rocks are formed from the heat flowing from the igneous rocks. Sedimentary rocks are formed from the sediments collecting in the basins created from rifting (that is, the divergent boundaries). Metamorphic and sedimentary rocks are not considered to be formed at divergent boundaries.
What features of sedimentary rocks are unlikely to be found in metamorphic rocks what features of metamorphic rocks do not occur in sedimentary rocks?
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Are igneous rocks the rarest rocks found on earth?
Apples are cool
When were the Andes Mountain formed?
The Andes formed during the Cretaceous period (about 138 million to about 65 million years ago) when the Pacific crustal plate began to slowly slide beneath the South American plate, uplifting and folding the sedimentary rocks that comprise the Andes (seePlate Tectonics).The Andean mountain system is the result of global plate-tectonic forces during the Cenozoic Era (the last 66.4 million years) that built upon earlier geologic activity. About 250 million years ago, the crustal plates constituting the Earth's landmass were joined together into the supercontinent Pangaea. hi
They make up the crustal rocks found beneath the oceans?
The mantle is the layer of the Earth beneath the crust that is composed of solid rock. The mantle is made up of silicate minerals rich in magnesium and iron. It is generally denser than the crust and accounts for a significant portion of the Earth's volume and mass.
What has less density--the crustal rocks or the mantle rocks?
Crustal rock is normally less dense than mantle rock.
Do plates and crustal plates differ?
No, plates and crustal plates are the same thing. They refer to the large, rigid sections of the Earth's lithosphere that move around on the semi-fluid asthenosphere beneath them. These plates are made up of both oceanic and continental crust and are responsible for the movement of continents and the formation of geological features like mountains and earthquakes.
The rock beneath the continents is made of?
The rock beneath the continents is primarily composed of granite and other metamorphic rocks such as gneiss and schist. These rocks are older and less dense than the oceanic crust, forming the thick, continental lithosphere that supports the continents.
What Crustal rocks are made up primarily?
Crustal rocks are primarily made up of silicate minerals such as feldspar, quartz, and mica. These rocks include granite, basalt, and gneiss, and are commonly found in the Earth's crust.
Where can the continental crust be found?
The continental crust can be found beneath the land masses or continents on Earth. It is typically thicker and less dense than the oceanic crust, composed of a variety of rock types including granite, sedimentary rocks, and metamorphic rocks.
How can such heavy things as the continents float?
Continents float because the rock beneath them is denser then the surface rocks The surface rocks are poorer in iron than the deeper layers. The continents are made mostly of silica rich rock, which is less dense than oceanic crust, so when the two come in contact, the oceanic crust sinks beneath the continent.
Which 2 continents had matching rocks and minerals found?
North America and Europe had matching rocks and minerals found, indicating that these continents were once joined together as part of the supercontinent Pangaea.
What two continents are rocks and minerals found on?
Rocks and minerals are found on every continent, not just two - they are found underneath the ocean as well.
Where is Migmatite found?
Migmatite is typically found in regions that have undergone high-grade metamorphism and partial melting, such as mountain belts and areas where deep crustal rocks have been exposed due to tectonic forces. Common locations include the interiors of continents where older rocks have been deeply buried and subjected to intense heat and pressure.
This layer of the earth's crust is the thickest?
The thickest layer of the Earth's crust is the continental crust, which can be up to 70 kilometers thick. It is found beneath the continents and is primarily composed of granite rocks and sedimentary layers.
Which components are much more abundant in mantle rocks than crustal rocks?
Mantle rocks are typically richer in magnesium and iron compared to crustal rocks. They also tend to contain higher concentrations of elements like silicon, calcium, and aluminum. Additionally, mantle rocks often have a higher density than crustal rocks due to their mineral composition.
