The surface in the Earth is broken " up " into large plates. It’s easy to confuse these plates with the Earth’s crust – the actual thin outermost layer in the Earth. But there is more on the structure of the Earth than this simple image of any ‘cracked egg-shell’.

The Earth’s layers might be defined in two different ways – based on that chemical composition or the mechanical properties in the rock. To understand just what plates are, it is essential to understand both of different models.

When we mention tectonic or lithospheric discs, we mean the sections into which the lithosphere is cracked. The surface on the Earth is divided into 7 major and 6 minor plates. The largest plates include the Antarctic, Eurasian, and North U . s . plates. Plates are over 125km thick, reaching highest possible thickness below mountain sectors. Oceanic plates (50-100km) are thinner versus the continental plates (up to 200km) and perhaps thinner at the ocean ridges the place that the temperatures are higher. Some plates are large enough to consist of both continental and oceanic crustal helpings (e. g. the Africa or South American plates) though the Pacific Plate will be almost entirely oceanic.


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