There is a spot just below the cliffs on the northern face of the Mikeno volcano which is known to attract animals in the search of salt. Elephants, buffalo, antelope, and mountain gorillas go there to scrape, crunch, lick, and eat the rock which is rich in salt and other minerals.
The whole group was lined up at this great salt buffet
This behavior is known as “geophagy”
Above the gorillas you can see the scrape marks left by elephants and buffalo