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IOWA ACADEMY OF SCIENCE 
Sandoval Granites. Red granites penetrating all pre-Cambric rocks 
of the Sandia. Magdalena and other ranges. 
Santa Fe Clays, Hayden. (U. S. Geol. Surv. Terr., Prelim. Field 
Rept., p. 66, 1869.) 
Santa Bit an Series. Mid Siluric section as repesented around Fort 
Bayard, and in the Cahallos and Franklin ranges ; it carries the Niagaran 
fauna. 
Sapello Quartzites. Main body of Archeozoic quartzites below the 
thick limestone section in the Solitario peak region, northwest of Las 
Vegas. 
Serna Schists. Basal part of the Archeozoic section near Picuris, 
north of Santa Fe, on the west dank of the Rocky mountains. 
Shandon Quartzites, Gordon. -(Prof. Pap. U. S. Geol. Surv., No. 68, 
p. 225, 1910.) Basal quartzites in the Cahallos mountains, probably 
belonging to the Dragoonan series. 
Shindrump Conglomerates, Powell. (U. S. Geog. and Geol. Surv., 
Geol. Uinta Mts., p. 41, 1876.) 
Sierra Limestones, Keyes. (Trans. American Inst. Mining Eng., Yol. 
XXXIX, p. 149, 1909.) Uppermost member of Early Carbonic se- 
quence at Lake Valley. 
Silver Shales, Keyes. (Trans. American Inst. Mining Eng., Vol. 
XXXIX, p. 147, 1909.) Mid Devonic black shales, weathering brown 
or red, of the Mimbres region. 
Solitario Slates. Extensive section of tilted Archeozoic beds lying 
above the main limestone exposed in Solitario mountain, northwest of 
Las Vegas. 
Taosan Series. Tilted Archeozoic sediments exposed in Solitario 
peak. They strike N. 50 degrees W., across Taos county, and dip about 
60 degrees SW. 
Tecovas Shales, Gould. (Water Supply and Irrig. Pap., U. S. Geol. 
Surv., No. 191, p. 231, 1907.) 
Tellara Limestones. Thick, uppermost gray limestone member of the 
Maderan series exposed on the east flank of the Sandia range. 
Tijeras Quartzites. Thick quartzitic beds best exposed in the great 
Tijeras arch of pre-Cambric rocks at the south end of the Sandia range. 
Timpas lAfnestones, Gilbert. (Seventeenth Ann. Rept., U. S. Geol. 
Surv., Pt ii, p. 566, 1896.) 
Torrance Shales. Upper, or vermillion section of the Bemalillan 
series of Carbonic red-beds in the Manzano mountains. 
Torrijon Clays, Dali. (Eighteenth Ann. Rept. U. S. Geol. Surv., Pt. 
ii, p. 347, 1898.) 
