This page updated February 6, 2013.  COMING:  Cape Sebastian, OR, differential weathering!

Rainbow Rock, Brookings, Oregon
Tightly-folded, thin-bedded, polychromatic, deep-water cherts, Dothan Formation

Requa Overlook, Del Norte Co., CA
Monochromatic chert cut by quartz veins, Broken Formation (more better to come)

North Bank, Chetco River, Brookings, Oregon
Northwest-dipping, intensely fractured, metasedimentary rocks, Dothan Formation