Lithosphere & Asthenosphere

Mr. Weather's World
Mr. Weather's World
82.3 هزار بار بازدید - 5 سال پیش - Learn about the two distinct
Learn about the two distinct regions of the Mantle, the lithosphere and asthenosphere. Subscribe for weekly videos: https://goo.gl/COrUU6

Mr. Weather’s World is a weekly video series bringing you interesting and reliable information about the Earth Sciences, Space Weather, and Climate Change. Tune in each week for exciting new content with host and meteorologist Curt Silverwood (Millersville University Alum).

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Last time, we discussed a broad overview of the Earth’s Mantle. In the Upper Mantle, there are two distinct regions called the lithosphere and asthenosphere.

The lithosphere is the solid, outer part of our planet. It is composed of the rigid upper portion of the mantle as well as the crust, which is the outermost layer of the Earth. There are two types of lithosphere, the continental and oceanic lithosphere which are part of the Earth’s crust.

The asthenosphere is the denser, weaker, and semi-molten region beneath the lithospheric mantle. This region is where rocks soften and partly melt, giving this area a thick, sticky consistency.

The lithosphere-asthenosphere boundary or LAB is the point of transition from the solid lithosphere into the more “gooey” asthenosphere. The LAB’s depth changes from place to place.

The lithosphere is divided into huge slabs called tectonic plates. This region is known for its association with tectonic activity. The tectonic plates slowly move on top of the melted rock beneath them in the asthenosphere. When these plates interact with each other they cause geologic activity such as earthquakes or volcanic eruptions.

Later on we’ll explore more about plate tectonics. Next time, we’ll look into the characteristics of the crust. Please subscribe to Mr. Weather’s World on YouTube for new videos every #WeatherWednesday!
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Thanks for watching!
5 سال پیش در تاریخ 1398/10/18 منتشر شده است.
82,305 بـار بازدید شده
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