Only a few miles from my house is Kanan Rd. that winds thru the Santa Monica Mountains to the ocean. I have found White Plume Agate 10 feet from the road several inches thick, Marcasite Agate 6" thick only a couple feet from the road and Sagenite Agate in the hillsides. Some of the plume has full angel wings standing proud of the agate making unbelievable specimens.