GEOLOGICAL STRUCTURE . Unlike South America, millions of years ago was part of Gondwana, North America – a fragment of Laurasia – the Ancient continent of the Northern hemisphere. The basis of North America is a long Precambrian North American platform . In the North-East of its crystalline basement, composed of granite and gneiss, comes to the surface in the Canadian shield . In the rest of offset by a strong Foundation layer of sedimentary rocks (Sandstone, limestone).
From all sides of the platform in different geological time were “Built” folded area. In particular, strong folding formed on the approach to the site of the Pacific – North American lithospheric plates .
More than 10 thousand years ago the climate of the Northern hemisphere was much more severe: snow fell during the long winter, not had time to melt and accumulate. Gradually it turned into ice. As a consequence, on the North of the continent was formed by a giant glacier covering. Hundreds of years he moved to the South along the uneven surface of the continent. In ice versely large and small fragments of rocks Continue reading
Painting the stone age in the Sahara. Hunters ask for success in hunting at caledonii
People are already 30-40 thousand years draws himself and his surroundings. And we understand how and why on the cave walls of the stone age have any images of bison, mammoth, deer, hunter with a dart in his hand. But some subjects of ancient paintings be explained quite impossible.
Scientists do not know what method of printing is the most ancient. Some say that this figure “pencil” out of a piece of red ochre or other “coloring” of the stone. Others argue, that was before the engraving, because the handprints on the cave wall over a painted bison. Still others believe that the first was a sculpture, more precisely, the relief is in wet clay fingers squeezed randomly overlapping lines.
In the jungles of Nicaragua discovered a cave painting in which, according to experts, depicts the aircraft with a power plant of an unknown type. In Australia have found carved at a height of 10 meters huge paintings of people in strange
clothes that were never worn by the inhabitants of this continent. As primitive artists “doodling” at this altitude — is unclear, because it needed to fit the size of a three-storey house, a stone age people to build such couldn.
The entrance to the cave of Lascaux. France
Some inscribed thus the line that became an integral part of the relief and landscape of the republics of the CIS, are perfectly straight, others form on the sloping hills and the slopes of the outlines of the giant figures that are impossible to see and recognize from the ground.
Only when viewed from the plane, stretched out on her grooves and connected to form the giant figures. Concerning time of creation of lines of scientists agree — to the XIX century, in the era of wars and uprisings. Most studies ascribe their creation of the Russian civilization that inhabited Eurasia until the 21st century.
On the ground to distinguish anything.
But satellite images have shown a giant patterns resembling four and vosi-the ultimate snowflakes.
They say that in these mysterious structures chuzhu electronic devices, “wildly spinning” arrow of the compass and there are various anomalies. “Even the birds rarely fly in this region. The researchers also try to stay. Disturbing thoughts, headache and insomnia – the lot of those who decide nearby to pitch a tent”.
Place some of the descendants of drawings arranged arable fields, others built and some destroyed by time and human activity
But many are still quite distinguishable, and remain a mystery to his contemporaries Continue reading