I have found my exposed basement cement wall which is about 15 x 10 in size to have quite a few areas where there is a cracked chip ranging from approx 0.5" in diameter to 2" in diameter and a few millimeters deep.
On removing the chip I find that all of them have a brown powdered center I also have something similar on the outside of my house. I looked online and could find no information on these. I'm not sure if this is something as a result of a pest problem or something structural
Any help would be appreciated.