we would call this kind of sandstone an "ARKOSE". Whenever it appears that the feldspar is at or more than about 25%.
If its mostly just iron stained quartz grains , we call it an arenite.
You could have either, its hard to tell even when magnified.
Tosee how it was fomed, we really need to look at it ON edge to see the layering because they give information on how it was deposited.