102 IOWA ACADEMY OF SCIENCES. 



Parkville shales, Keyes. (American Geologist, Vol. XXI, p. 345, 1898.) 

 A designation for shales exposed on the Missouri river, and included 

 between the lola and Stanton (Plattsburg) limestone. 



Pawnee limestone. Swallow. (Kansas Geol. Sur., Prelim. Kept., p. 24, 

 1856.) The top member of the Henrietta as now known was thus designated. 



Pawnee limestone series, Swallow. (Kansas Geol. Sur., Prelim. Rept., 

 p. 24, 1866.) In southeastern Kansas, the title covered all of the Henri- 

 etta, except the basal limestone. 



Pennsylvanian series, Williams. (U. S. Geol. Sur., Bull. 80, p. 108, 

 1891.) Proposed for the Coal Measures of the United States. 



Pennsylvanian series, Beyer. (Iowa Geol. Sur., Vol. IX, p. 190, 1899.) 

 In Story county, Iowa, the name is used for the lower coal measures. 



Platte division. Meek. (U. S. Geol. Sur. Nebraska, p. 85, 1872.) Applied 

 to shales below limestone bed B (Forbes limestone) down to and including 

 the limestone at Plattsmouth and a few feet of shales beneath. 



Platte shales, Keyes. (American Geologist, Vol. XXIII, p. 308, 1899.) 

 An adaptation of Meek's earlier title of Platte division. 



Plattsburg group, Broadhead. (Missouri Geol. Sur., Iron Ores and 

 Coal Fields, pt. ii, p. 94, 1873.) Applied to a number of limestone beds 

 exposed on the Missouri river above Kansas City, that are essentially 

 equivalent to Swallow's typical Stanton limestone, and Haworth's Garnett 

 as originally used. 



Plattsburg; limestone, Keyes. (American Geologist, Vol. XXIII, p. 

 305, 1899.) An adaptation of Broadhead 's earlier term of Plattsburg group, 

 for the third great limestone terrane of the Missourian series. It now 

 embraces a few feet more than was intended to be covered by Broadhead, 

 which properly belong to it. As Swallow's typical Stanton is an exact 

 equivalent to Broadhead's the former term is adopted, 



Plattsmouth beds, Meek. (U. S. Geol. Sur. Nebraska, p. 94, 1872.) 

 Refers to the section exposed at Plattsmouth, which is chiefly the lime- 

 stone. 



Plattsmouth limestone, Keyes. (American Geologist, Vol. XXIII, p. 

 305, 1899.) An adaptation of Meek's term for one of the upper limestone 

 terranes of the Missourian series. 



Pleasanton shales, Haworth. (Kansas^ Univ. Quart., Vol. Ill, p. 274, 

 1895.) The upper member of the Des Moines series was designated by this 

 title. The formation corresponds almost exactly to Swallow's Marais des 

 Cygnes. 



Pottawattamie formation, Haworth. (Univ. Geol. Sur. Kansas, Vol. Ill, 

 p. 93, 1898.) Proposed to iaclude the Bethany limestone, the Thayer shales, 

 the lola limestone, the Parkville shales and the Stanton (Plattsburg) lime- 

 stone. 



Quenemo limestone, Hall. (Univ. Geol. Sur, Kansas, Vol. I, p. 104, 

 1896.) Name of a thin layer, five feet thick, seventy-five feet above the base 

 of the Platte shales, in Osage county, Kansas. 



Raven Cliff sandstone. Bain. (Iowa Geol. Sur., Vol. IV, p. 341, 1895.) 

 Name applied to one of the thick massive sandstone deposits, in the lower 

 part of the Cherokee, in Mahaska county, Iowa. 



Redrock sandstone, Keyes. (Am. Jour. Sci., (3), Vol. XLI, p. 273, 1891.) 

 Propo.sed for a conspicuous and important deposit of massive sandstone in 

 Marion county, Iowa, in the lower part of the Cherokee. 



