Stock tank

Small reservoir for watering stock, off the Greeley Crossing road in extreme northern Nevada. These small watering ponds are commonly called "tanks" in the western US. I've seen it alleged that this is a literal translation of Spanish "tinaja", but it could just be another survival of an older usage. According to the online etymology dictionary, "tank" meant pond originally.
Lots of these little ponds dried up in the drought, so it's nice to see it holding water! It just catches the occasional runoff in this usually dry drainage. In fact, it was apparently dry when the satellite view was taken.