As far as agate is concerned, carnelian is relatively common throughout the Willamette River drainage. I bought a collection from an older couple years ago. About 3000 lbs of carnelian from creeks near Cottage Grove. Find some whenever I fish the local gravel bar near Harrisburg.
If your really looking for a name, I would go with orange Quartz or Chalcedony. If you know where it was found maybe you can find a reference a more specific name. Here is a link to probably the best Quartz info page that I am aware of.