I recently found a red ochre deposit while digging for atifacts. It seems to be a man-made pit, judging from how it is situated and fairly symmetrical. I am trying to find pictures to post, but it looks as if it may have been a deposit they used on this particular site. It extends from about 18" below the current grade to a depth of approximately 48". Looking at it from the side, it looks to be about the size of a 55 gallon drum, as a reference. I've found many fire rocks around it, as well as plenty of points and tools. That particular area I'm digging has almost filled back in after recent downpours, but I will be digging it back out in the next month or so.
I'd be very interested in what everyone thinks about it.