Geosphere is defined as any of the almost spherical concentric regions of the Earth. It is composed of the lithosphere, hydrosphere, cryosphere, and atmosphere. Solid Earth refers to the ‘earth beneath our feet’ or terrra firma; as opposed to atmosphere and hydrosphere, which are Earth’s fluid envelopes.
The lithosphere is the uppermost layer of solid Earth. Sometimes, the terms ‘geosphere’ and ‘lithosphere’ are used synonymously. It is the Earth’s crust which includes the solid outer section. This Buzzle article has collated some interesting facts about the lithosphere.
✦ The lithosphere itself is divided into tectonic plates consisting of the continents
✦ Geologist Joseph Barrell observed the gravity anomalies over the continental crust and put forth the theory of a solid upper crust; which he called the ‘lithosphere’, with an underlying semi-molten layer termed as ‘asthenosphere’.
✦ It is believed that the continents originated from a single landmass known as ‘Pangaea’. The lithosphere broke into different landmasses―the tectonic plates―breaking the Pangaea.
✦ Mantle is the largest layer of Earth (1802 mi thick). It is further divided into upper mantle and lower mantle. The upper part of the mantle is a layer beneath the crust, which is dense and is 31-62 mi