A photo from open sources
Studies have shown that the Ocean of Storms on the Moon formed in the result of tectonic processes on the lunar surface. Earlier The Ocean of Storms was considered a crater after the impact of a giant asteroid. Ocean of Storms and other lunar lowlands, giant dark spots on the visible, nearest side of our natural satellite – on the very In fact, plains formed by basalt rock. 
Photos from open sources
Scientists previously believed that the Ocean of Storms is a crater up to 2,000 miles (3200 km) wide, formed by the impact of an asteroid. Created by Researchers Ocean Storm map in high resolution, according to GRAIL NASA’s mission shows that the Ocean’s border is polygonal, and not round – this does not speak in favor of an asteroid impact. GRAIL twin spacecraft designed to study the tides and ebbs, circled the moon and measured the jumps of gravitational attraction on its surface. All items with mass have gravitational field attracting objects to them. Field strength attraction depends on the mass of the object. Therefore changes gravitational fields allow you to calculate the mass distribution under the surface of the moon. NASA launched GRAIL gravity probes with September 2011 In 2012, after the end of the mission, both spacecraft crashed into the surface of the moon. Analysis created gravity maps of the moon revealed a set of linear structures in the area Ocean Storms. Sizes of rectangular objects reach 1600 miles (2600 km) wide. Revealed angular shape of the boundaries of the Ocean Storms testify that it was not created by the fall space body – an asteroid would leave a crater with a round rim. Researchers consider the discovered structures to be remnants of valleys, formed by solidified lava. Cooling and contracting, the lava forms fractures forming a polygonal picture. Similar can be seen among the cooling lava flows on Earth. Lava flows decay with the formation of hexagonal columns. Hexagons are formed in connection with the characteristics of cracking. Converging three cracks on a flat surface form just a hexagon. The geometry of the sphere is somewhat different from the geometry of the plane, here why on the moon the polygon has four sides, and not six.
NASA’s moon
