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150 PROFILE Rim of Ca�adon Northwest of (Written Sideways: To Tehuelche Poorly exposed Patagoniano Grey tuff with Pecten, Pinna, etc. 20' Obscure. Lava, thickness ? ? small. Baked tuff 20' Obscure, with occasional exposures of yellowish tuff. 10'� Lava ? lenticular surface flow. R76 Contact zone ? R77 15' massive yellow tuff. These beds actually dipping 1' hard white tuff. roughly SW at ca. 10�. Ca. 90' Massive tuff, white to pale pink, but yellowish at very top. Bone frags on surface, not ident., none found in place.) CE 151 Profile CC. (Written Sideways: Preceding section. Clays, frequently very concretionary, x-bedded sands, Various blocks of etc. Similar white, pink, and buff to Pehuenche. Tuffs. -#456 Marine beds with Ostrea, Pecten, etc. Inferred Massive fault tuff Various faults, inferred and visible. Condensed diagram along a somewhat irregular line.)