Mare Fecunditatis

Mare Fecunditatis – the Sea of Fertility, is a vast basin on Luna, moon of Earth. Stretching 1463 kilometers in diameter, it is home to glasses, pyroxenes, feldspars, oxides, olivines, troilite and metals in its lunar soil, which is called regolith. Studies show the basaltic flow inside of the Fecunditatis basin perhaps occurred all at once, making its chemical composition different from other maria. The lower titanium content means it is between 3.1 and 3.6 billion years old!

The western edge of Fecunditatis is home to features called grabens. These down-dropped areas of landscape between parallel fault lines occur where the crust is stretched to the breaking point. On Luna they are found around basins. The forces created by lava flow increase the weight inside the basin, causing a tension along the border which eventually fault and cause these areas.