It looks like brecciated jasper with the fill being chalcedony and a few druzy pockets.It can occur in both igneous and plain ol' sedimentary country. Neat cabbing material. c
I was thinking jasper as well, but the webbing had me hung up. Here's a couple more pics of finds that day. There is quite a bit of the petrified wood along the upper part of the drainage, then a nice paleo river bed is exposed on both sides, the pan is from a 5 gal. sample.
Capt. Z that's just hilarious, your comment had me laughing almost as hard as reading about your e-bay shopping Ha! Ha! Ha!