Relic of an Ice Age That Hasn't Happened

Relic of an Ice Age That Hasn't Happened, originally uploaded by Bearded Jon.

Petroglyph, if the beer hasn't rendered me illiterate, is the word that describes something left by an ancient for us to interpret now, whenever now may be.

This petroglyph has been rendered in ice and, while I'm not certain where I should go with the interpretation, I know it was left for me. Well, maybe it was left for me and a few thousand otheres, because it is in town square, right in front of everybody, but it has some special significance to me. Or should it?