Often, waterfalls form as streams flow from soft rock to hard rock. This happens both laterally (as a stream flows across the earth) and vertically (as the stream drops in a waterfall). In both cases, the soft rock erodes, leaving a hard ledge over which the stream falls
Surface currents that move in a path opposite to the wind currents
The area just north of Lake Baikal is called the Irkutsk Oblast, where the city of Irkutsk is located (in Siberia).
