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CAMP 5 161 Notes on Cabeza Blanca Profile DA Specimens: see p. 105 I. FACIES AND FORMATIONS. On Cabeza Blanca there are six chief facies or formations, viz.: 1. Rodados, in places forming thin lenses, water deposited, on the flat top of the peak. 2. Marine tuffs, yellowish, massive, overlying a relatively thin, lenticular marine basal ss. or cg. 90'�. 3. Fine sands, generally soft and grey to yellowish. Thin-bedded. X-bedded on a small scale. In the upper part with lenses of harder + often coarser ss., or cg. Fine sands often ripple marked. Stream or small delta deposit. 0-40'�. 4. Greenish-grey channel beds, very irregular, often x-bedded. Ranging from tuff to sand to fine cg. Materials apparently generally pyro- clastic, appearance even of sands unlike that of 3. 0-75'� 5. Thickly + generally rather vaguely bedded non-channel tuffs, probably both wind- and water- deposited. Generally yellowish on weathered surfaces at least. Bedding apparently broadly oblique to the basal contact. 0-90'� 6. Massive pale-colored tuffs, generally buff to pinkish, but also grey + yellowish. Bedding usually very vague or invisible. Many small concretions, esp. in upper part. At least 50' + probably much more, base not exposed here.