SPOR

Suspicious Pile Of Rocks. Abbreviation used in Geocaching to indicate that a cache container is hidden under a pile of rocks that look suspicious or out of place. Capitalized indicate a large pile, lower case indicates small pile.

Take a look at that SPOR next to that bush, I bet the cache is there.

RaoF

Abbreviation used in Geocaching to describe a pile of rocks hiding a cache container. Rocks Are Our Friends

Desert geocaching hides always seem to be the RaoF type due to the lack of bushes.