I took a break from flintknapping and finished up on some ground stone artifacts. The flat stone with the three small depressions is called a nutting stone, Native Americans used these for cracking acorns, hickories and other types of nuts. There is also a sandstone mortar which is useful in grinding charcoal and stones for pigments. It is still a little shallow, I want to peck and grind it a little deeper I think. The small grayish stone dish will be used as a paint pallete. I made the paint brush using a piece of cat-tail stalk with a little yucca fiber and pine pitch to glue the fibers in place.
stoneagepaths 
How did you make the shallow depression? Rubbing/pounding a hammerstone on the base stone?
Yes, I used a large sharp piece of flint as a hammerstone and just pecked away, then I used a piece of sandstone and water to grind. Then I just repeated the process several times. The hamerstones wear out pretty fast, but easy enough to resharpen.