1. Highlands: These are the oldest regions of the moon, with some craters dating back over 4.5 billion years. The highlands are generally more rugged and heavily cratered than the maria, and they contain a higher concentration of heavy elements such as iron and magnesium.

2. Maria: These are large, dark, relatively smooth plains on the moon. They are thought to have been formed by large impact events that excavated deep basins, which were then filled with lava. The maria are typically younger than the highlands, with most forming between about 3 and 1 billion years ago.

3. Rilles: These are long, narrow, valley-like features on the moon. They are thought to have been formed by a variety of processes, including tectonic activity, volcanic activity, and the collapse of lava tubes.