They are the "maria". They were formed from volcanic lava flows.
I haven't really thought about it before, but I believe that the dark blue areas on the moon's surface are perhaps the shadows within the canyons and craters on the moon.
Rilles
The moon is mostly covered with craters.
the holes in the moons surface are where astroids hit the moons surface
The very largest impact features on the Moon are the enormous impact basins: great circular plains from 300 to more than a thousand kilometers across
meteorite
craters
craters
Dark flat areas on the moons surface
Rilles
A "Maria", which is translated into "sea".
The moon is mostly covered with craters.
Europa...
that there are dark flat creators on the regions of moons surface.
the holes in the moons surface are where astroids hit the moons surface
The Great Dark Spot, hurricanes, and swirling clouds.
everyone nose that the moon is made out of cheese, but what most people don't know is there are nachos deep in the core
Earth's shadow on the moon proved that earth wasn't flat. When galileo first turned his telescope to the moon, he found a surface scarred by craters and maria. Before that time, many people believed that all planetary bodies were "perfect" without surface features.