Английский для Нефтяных специальностей

Здравствуйте! Я изучаю Английский язых, вот в этом блоге буду размещать тексты на английском языке, по нефтяным специальностям или специальностям хоть как то связанным с добычей нефти и газа, например геология, бурение, нефтеразработка и т.д.

Вот первый текст - История земли :-)

History of the Earth
The earth is thought to have formed about 4.6 billion years ago out of a cloud of cosmic dust. As the planet was drawn together by its own gravity, the heat of compression and its radioactive elements caused it to become molten. The heaviest components, mostly Iron and Nickel, sank to the Earth's centre and become the core. Lighter minerals formed a thick molten mantle. Other minerals rich in Aluminium, Silicon, Magnesium and other light elements solidified into a thin rocky crust.
The surface of this young planet was extremely inhospitable. Molten rock (Magma) erupted through fissures and volcanoes, as did the gases and water vapour that formed the early atmosphere.
As the surface cooled, water vapour condensed and fell in torrential rainstorms and the first oceans were formed.
Over time, the Earth's crust has grown thicker and more stable. It is viewed by Geologists as an assembly of plates. These plates are continually moving and changing shape. In some places they slide past one another, in other places they pull apart or collide. The theory that explains this process is called Plate Tectonics.