Sailing stones, also called sliding or crawling stones, are a geological phenomenon discovered on the dried-up lakebed of Racetrack Playa in Death Valley, USA. The stones slowly move across the clay bottom of the lake, leaving long trails behind them. The stones move on their own without the help of living creatures, but until Christmas 2013, no one had ever seen or recorded the movement on camera. Similar movements of stones have been noted in several other places, but Racetrack Playa stands out among the rest in terms of the number and length of the trails.
Description
Sometimes the stones change the direction of their movement
Most of the sliding stones end up on the bottom of the dried-up lake from a dolomite hill 260 m high, located at the southern end of Racetrack Playa. The weight of the stones reaches several hundred kilograms. The trails behind them are several tens of meters long, 8 to 30 cm wide, and less than 2.5 cm deep.
The stones move only once every two or three years, and most of the trails remain for 3–4 years. Stones with a ribbed bottom surface leave straighter trails, while stones lying on their flat side wander from side to side. Sometimes the stones turn over, which is reflected in the size of their trail.
Знание некоторых закономерностей освобождает от изучения многих фактов.
Мечты сбываются рано или поздно, так или иначе.