Jurassic radiolarian chert, Oregon silica, deep sea sedimentary rock, bedding, strata, closeup, close-up https://geologypics.com/wp-content/uploads/2017/07/geology-pics.png 0 0 Marli Miller https://geologypics.com/wp-content/uploads/2017/07/geology-pics.png Marli Miller2022-04-19 05:16:432022-04-19 05:20:48Jurassic radiolarian chert, Oregon
