Earth’s crust – Everything you should know about
Earth’s crust meaning & definition
Earth's crust is Earth's hard outer layer. It is less than 1% of Earth's volume.
Earth’s crust is made of
Different types of rocks: igneous, metamorphic, and sedimentary rocks.
What is Earth’s crust state of matter?
The Earth's crust is solid matter. Earth’s crust is roughly made of rocks (Both of oceanic and continental crusts).
Some of Earth’s crust characteristics & infomation
The crust occupies less than 1% of Earth's volume and is divided into two distinctive types: oceanic and continental.
Earth’s crust thickness
The oceanic crust is 5 km (3 mi) to 10 km (6 mi) thick and is composed primarily of basalt, diabase, and gabbro.
The continental crust is typically from 30 km (20 mi) to 50 km (30 mi) thick and is mostly composed of slightly less dense rocks than those of the oceanic crust. Some of these less dense rocks, such as granite, are common in the continental crust but rare to absent in the oceanic crust.
Earth’s crust temperature
The temperature of the Earth’s crust ranges considerably.
At its outer edge, where it meets the atmosphere, the crust’s temperature is the same temperature as that of the air. So, it might be as hot as 35 °C in the desert and below freezing in Antarctica. On average, the surface of the Earth’s crust experiences temperatures of about 14°C.
However, the hottest temperature ever recorded was 70.7°C (159°F), which was taken in the Lut Desert of Iran as part of a global temperature survey conducted by scientists at NASA’s Earth Observatory.
That’s quite the range already. But consider the fact that the majority of the Earth’s crust lies beneath the oceans. Far from the Sun, temperatures can reach as low as 0-3° C (32-37.5° F) where the water reaches the crust.
If you dig down into the continental crust, temperatures will go up. The temperature of the crust typically in the range from about 200 °C (392 °F) to 400 °C (752 °F) at the boundary with the underlying mantle.
Earth’s crust mineral & element
The most abundant minerals in Earth's continental crust are feldspars, which make up about 41% of the crust by weight, followed by quartz at 12%, and pyroxenes at 11%.
Earth's crust element's pie chart:
Some interesting Earth's crust facts
The crust is deepest in mountainous areas, up to 70km thickness
The continental and oceanic crusts are bonded to the mantle, forming a layer called the lithosphere. This layer is cool and rock solid.
Beneath the lithosphere there is a hotter part of the mantle that is always moving, this called the lithosphere and causes volcanoes and earthquakes.
Source: Wikipedia.org, universetoday.com, quora.com
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