About 8.5 miles west of the Palo Verde nuclear power plant on W Elliot Road (west of Phoenix) we came across a flood plain covered in pieces of Jasper, Agate, Chalcedony and some Fire Agate. The road forks here and both roads turn into deep sand washes within 100 yards. As our Xterra is only 2WD, we decided that this was as good a place as any to start for the day. The material is pretty evenly strewn across the valley between three hills. It appears as if most of this material was deposited by a massive flooding of the area. After digging deeper looking for better material a few times it became apparent that this material is pretty much only in the top inch or so of the soil.
We found a broad variety of Jaspers dominated mostly by a nice looking chocolate brown jasper. Chalcedony was strewn everywhere, and in a number of spots small pieces of Fire Agate and colored Chalcedony are plentiful. The Fire Agate does't seem to come from the hills surrounding the valley which is why I think it was deposited by a flood.
It was a great day. The dogs had a blast, we had a great time and we found some nice material.