336 
STRATIGRAPHICAL GEOLOGY 
Chaman Series, Keyes. (Proc. Iowa Acad. Sci., Vol. XIII, 
p. 224, 1908.) 
Chiquifo Sandstones. Name is derived from the Rio Chiquito 
Colorado, in the lower valley of which the rocks are well exposed. 
Chiricahuan Series, Keyes. (Proc. Iowa Acad. Sci., Vol. XXII, 
p. 261, 1916.) 
Chloridian Series, Keyes. (Proc. Iowa Acad. Sci., Vol. XXII, 
p. 261, 1916.) 
Cibola Limestones, Keyes. (Proc. Iowa Acad. Sci., Vol. XXII, 
p. 261, 1916.) 
Cochise Limestones. Name is proposed for the lower part of the 
Fredericksburg section of Texas, finely exposed in the southeast¬ 
ern portion of Arizona. 
Comanchan Series, Hill. (Am. Jour. Sci., (3), Vol. XXXIII, 
p. 298, 1887.) 
Doloresian Series, Cross. (Atlas of United States, U. S. Geol. 
Surv., Folio 57, p. 2, 1899.) 
Dragoonan Series, Dumble. (Trans. American Inst. Mining 
Eng., Vol. XXXI, p. 713, 1902.) 
Edwards Limestones, Hill and Vaughn. (Eighteenth Ann. 
Rept. U. S. Geol. Surv., Pt. ii, p. 227, 1898.) 
Elden Limestones. Name is derived from Elden Mountain, 
near Flagstaff, and covers the beds of the Mississippian series 
carrying the Keokuk fauna. 
El Pasan Series, Keyes. (Science, N. S., Vol. XXIII, p. 922, 
1906.) 
Havasupai Sandstones. Term is applied to the median sand¬ 
stone section of the Aubreyan series, best exposed in the rim wall 
near the Bass Camp west of El Tovar. 
Holbrook Sandstones. Title is suggested for the main sand¬ 
stone section of the Moenkopian series in the Rio Puerco valley, 
especially in Navajo County. 
Huethawali Limestone. Designation for the lower 200 feet of 
the limestones of the Aubreyan series, typically exposed in the 
esplanade at the head of Bass Canyon, west of El Tovar. 
LaPlata Sandstones, Cross and Spencer. (Atlas of United 
States, U. S. Geol. Surv., Folio 60, p. 4, 1899.) 
