Wake up the Earth's crust

Almost all the plain old layer of skin consists of folds and crystal structure of the rock from the era Prekambrium. About the theoretical significance of rocks for geology, there is no agreement.
there are theories that categorize crust from South America, South Africa, Asia and Australia as part of a southern continent in the past (Mainland Gondwana) separate into parts of the earth deeper by convection currents, in a relatively short time . Skins is indeed the remains of a still older rocks, which is divided by the erosion of the peninsula and the lands since the early Cambrian period multiples do not experience anymore.
It can be known with certainty because in some parts found sendimen Cambrian sediments which remain located at the top without showing a change.
Throughout geologic history, around and on the basis of the continents often precipitates, sometimes until as thick as several kilometers above the earth's crust and layers of experience mirrors once or several times because the style of the great strengths of the earth.
Activity in shaping the earth's mountains and faults are always proceeded in a cyclical; active periods marked by the emergence of a new mountian areas, always intermittent with periods of calmer, at that time mountian areas destroyed by erosion and materials taken to the sea which is a basin-basin geosinklinal; and while the sea floor down, the basin was filled with sendimen and be involved again in a period of folding.
Every daily newspaper, takes millions of years old and geologically, we today are in a very active period.

throughout its history, Earth has experienced four periods folding, namely:

1 - Kaledonik (420-300 million years ago), named according to a mountian in Scotland, the remains still exist on the European continent, including in England, Scotland and Norway.

2 - Hersinik (300-200 million years ago), called by name mountian Hertz in Germany, remains in the Western and Central Europe, mountian Ural, Middle Asia, Australia, Northeast and parts of central North America.

3 - Mesozoic (60 million years ago), there Mesozonik folds in the Northeast and Southeast Asia, New Zealand, and coastal areas of North and South America. all mountian that has now become a low and rounded because of erosion effects.

4 - Alpin (still continues today), folds Alpin still high and steep, the shape is still sharp and pointy, rock layers showed a clear fold, and even climbed on top of existing layers of other rock layers. This leap may be regarded as covering all regions of the world's highest mountian; starting from Europe, runs through the area to the mountian Apenina Atlas, then through a series of mountian wide area in Asia Minor until kegugusan islands in the Indonesian archipelago; here it's Eurasia Area folds met with the regional folds located in a circular arc Alpin is geological instability that often appear as a symptom and a variety of volcanic earthquakes.