Ответы и объяснения

2012-05-17T15:43:27+00:00

St. Petersburg
At the present territory of St. Petersburg and the surrounding area of approximately one million years ago there were deciduous forests, deep rivers flowed. In times of globalcoolings, this territory was covered by continental ice several times. The thickness of the ice cap reaches more than 1 km. The era of the great glaciation lasted several tens of thousands of years. Approximately 20-25 thousand years ago, the glacier began to melt, and about 12 000 years ago, he melted. 10-7,5 thousand years ago, the Neva was not. In its place two rivers flowed (today Tosna and Mga). Approximately 4-4.5 thousand years ago there was Neva. River at a relatively young geologically. In its current form Neva was formedabout 2.5 thousand years ago.