| The dirt road drops down into the northern end of Last Chance Canyon, now part of Red Rock Canyon State Park; here, the view is roughly southward. At left and center of image are pale pinkish volcanic tuffs overlain by reddish volcanic tuff breccias of the Middle Miocene Cudahy Camp Formation of the Ricardo Group--rocks dated by radiometric methods at roughly 18 to 15 million years old. Through the gap at right center, in the distance, can be seen a patch of greenish-gray sedimentary rock that belong to the late Middle Miocene Dove Spring Formation, 13 to approximately 7 million years old--strata that yielded one of the most famous petrified wood bonanzas in all of California. |