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VAUOHAN.]
SECTIONS IN VICINITY OF SAN CAELOS.
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was not determined which of the horizons it represents, i. c., whether the one just below the coal or the one at the base of the section of the mountain.
Fossils from fault north of shaft of San Carlos Coal Company {field No. 300).
Ostrea elegantula Newberry. Exogyra costata Say var. Inoceramus proximus Tuomey. Cyprimeria sp. Cardium alabamense Gabb. Rostellites sp. Gyrodes sp. Gyrodes crenata Conrad? Schloenbachia delawarensis (Morton). Flacenticeras guadalupse (Roemer).
Sands and Clays.
From observations in the entries at the shaft of the San Carlos Coal Company and in mine No. 4, it was ascertained that the clays and sandstones, which are yellowish on the surface, are of bluish color before exposure to the influence of weathering.
San Carlos and Arroyo Above.
Near the store at San Carlos (field No. 296) were collected Placenti ceras guadalupae (Roemer) and Schoenbachia delawarensts (Morton). , Along the San Carlos arroyo, above San Carlos, in the sandstone and clays above the coal, a few fragmentary vertebrate remains were collected, which have been examined by Mr. F. A. Lucas. He states that they include a fresh-water turtle and several dinosaurian bones of Cretaceous type.
Resume of San Carlos section.
Quartz-pantellerite. * Vieja series: 5. Ledges of variegated rock, probably largely pyroclastic. 4. Conglomerate bed. San Carlos formation: 3. Sandstone and clays above coal, containing Cretaceous vertebrates. 2. Coal horizon. 1. Sandstone and clays below the coal, containing three or four horizons of invertebrate fossils.
For the sandstones and clays containing the coal, below the Vieja series to the base of the San Carlos section, the name San Carlos for mation is proposed. Bull. 164 6
Section of Gettysburg Peak, 1 mile north of San Carlos.
(PI. IX; PI. XI, fig. 2c.) Feet.
3. Quartz-pantellerite 180 2. Ledges of variegated rock resembling sandstone, but probably composed largely of pyrocla i;tic rhyolite 300 1. Conglomerate ed.
