Near the small town Romenear Costești there are many different rocks.
These are piles of bulging boulders that “come out” of the ground, grow in size and move, as if they were alive. In everyday language, they are called “living stones”, and in scientific language, trovants.
Some consider them to be sand concretions with a tough outer layer of sand. They are harder than other rocks nearby, and when the surrounding softer rocks break down, the trovans appear to pop out of the ground, he reports. Noi.mdreading
During rains, the water reacts with the minerals in the concretions, the inside of the stone swells in the form of strange bubbles, and this looks as if the trovans “give birth to offspring”. Of course, these are all very slow processes. In 1.2 millennia, the stone “grows” by less than 5 cm.
According to scientists, millions of years ago, in these places there was a river delta containing deposits of sand and siltstone, brought by a prehistoric flow from the whole continent. Then, the mineral components gradually dissolved and circulated in the sand and gravel basin. They also played a cementing role, sticking together different sedimentary particles. Therefore, today’s trovans differ in composition.
