WEEKS 
PETROLOGY, AND MINERALOGY FOR 1892-1900. 
103 
Geologic formations described— Continued. 
Oneida conglomerate, Luther, 3003. 
( (neida conglomerate, White, (5070. 
Oneontabeds, Clarke and Schuchert, 965. 
Oneonta formation, Prosser, 4497. 
Oneonta sandstone, Clarke, 958. 
Onondaga, Ries, 4622. 
Onondaga group, Luther, 3603. 
Onondaga limestone, Bishop, 448. 
Onondaga limestone, Clarke, 971. 
Onondaga limestone, Clarke and Schuchert, 
965. 
Onondaga limestone, Prosser, 4493. 
Onondaga limestone, Weller, 6003. 
Ontarian, Winchell and Grant. 6289. 
Ontario, Clarke, 971. 
Ontaric, Clarke and Schuchert, 965, 977. 
Orca series, Schrader, 4830, 4833. 
Oread limestone, Ha worth, 2375, 
Oread limestone, Wilson, 6270. 
Oriskanian, Clarke, 971. 
Oriskanian, Clarke and Schuchert, 965, 977. 
Oriskany, Ries, 4622. 
Oriskany beds, Clarke, 971. 
Oriskany beds, Clarke and Schuchert, 965. 
Oriskany beds, Weller, 6003. 
Oriskany formation, O'Harra, 1129. • 
Oriskany sandstone, Lincoln, 3512. 
Oriskany sandstone, Luther, 3602, 3603. 
Orthis bed, Sardeson, 4799. 
Orthis bed, Winchell and Ulrich, Li337. 
Orthisina bed, Sardeson, 47U'J. 
Orthoceras bed, Sardeson, 4799. 
Orting gravel, Willis, 6209. 
Osage, Keyes, 3127, 3129. 
Osage, Weller, 5990, 5993. 
Osage City shale, Beede, 390. 
Osage series, Broadhead, 606. 
Osage shale, Crane, 1137. 
Osage shale, Haworth, 2375. 
Osceola till, Willis and Smith, 6216. 
Osceola till and clay, Willis, 6209. 
Osgood limestone, Foerste, 1839, 1840. 
Oswegan, Clarke, 971. 
Oswegan, Clarke and Schuchert, 965, 977. 
Oswegatchie series, Smyth, 5093. 
Oswego, Winchell ami Ulrich, 6337. 
Oswego limestone, Haworth, 2375. 
Otis limestone, Norton, 1124. 
Otter shale, Weed, 5953. 
Otterdale sandstone, Shalerand Woodworth, 
4939. 
Ouray limestone, Spencer, 5118. 
Oxmoor sandstone, McCalley, 3818. 
Ozark, Keyes, 3127. 
Ozarkseries, Broadhead, 606, 607. 
Packard rhyolite, Smith, 5032. 
Paine shales, Weed, 595:;. 
Palisades conglomerate, Spurr, 517:;. 
Palmer gneisses, Van Hise and Bayley, 5701. 
Pamunkey formation, Clark, 912. 
Panama formation, Hershey, 2489. 
Panama formation, Hill, 2557. 
Panola formation, Campbell, 736. 737. 
Park shale, Weed, 5953. 
Parkville shale, Keyes, 3142, 3148. 
Parma sandstone, Lane, 3394. 
Geologic formations described— Continued. 
Parting quartzite series, Spurr, 5175. 
I'aso Robles formation, Fairbanks, 1768. 
Patapsco, Clark and Bibbins, 913. 
Patapsco formation, Clark, 912. 
Patoot series, White and Schuchert, 6048. 
Patuxent, Clark and Bibbins, 913. 
Patuxent formation, Clark, 912. 
Pawnee limestone, Haworth, 2375. 
Pawnee limestone, Keyes, 3113. 
Pawtucket shales, Shaler, Woodworth, and 
Foerste, 4940. 
Payette formation, Lindgren, 3539, 3540, 3548. 
Payette formation, Knowlton, 3246. 
Pearl River series, Hitchcock, 2626. 
Pecatonica limestone, Hershey, 2480. 
Pelham limestone, McCalley, 3818. 
Pelican sandstone and shale, Tyrrell. 5501. 
Pennington shale, Campbell, 736, 737, 739, 740. 
Pennington shale, Keith, 2905. 
Pennsylvanian series, Beyer, 135. 
Pennsylvanian series, Campbell, 737. 
Pensauken formation, Salisbury, 4775. 
Pensauken formation, Salisbury and Knapp, 
4773. 
Peorian soil, Campbell and Leverett, 742. 
Peorian zone, Leverett, 3495. 
Perkasie shale, Lyman, 3616. 
Perry limestone, Keyes, 3090. 
Phelps sandstone, Shepard, 4946. 
Philadelphia brick clay, Salisbury and Knapp, 
4773. 
Phillipsburg formation, Marcou, 3663. 
Phylloporina bed. Winchell and Ulrich, 6337. 
PictOU formation, Ami, 110. 
PictOU freestones, Ann, 87. 
Pierre, Darton, 1322. 
Pierre (day, Darton, L328. 
Pierre formation. Gilbert, 2005. 
Pierre shale, Hills, 2598, 2599. 
Pilgrim limestone, Weed, 5953. 
Pine Creek conglomerate, Udden, 5517, 5522. 
Pinto diorite, Weed, 5945. 
I'inyon formation, Smith, 5039. 
Platte Shale, Keyes, 3128, 3142, 3148. 
Plattsburg limestone, Keyes, 3128, 3142. 
Plattsmouth limestone, Keyes, 3128, 31 12, 31 18. 
Pleasanton shale, Bain, 195. 
Pleasanton shale, Crane, 1137. 
Pleasanton shale, Haworth, 2375. 
Pleasanton shales, Keyes, 3113, 3139. 
Pleasanton shale, Marbut, 3646, 3648,3649. 
Pocahontas formation, Campbell, 735. 
Pocono formation, Clark, 912. 
Pocono formation, O'Harra, 4129. 
Pocono sandstone, Darton, 1335. 
Point Levis, Marcou, ;m3. 
Poison Canyon formation, Hills, 2599. 
Poison Canyon beds, Osborn, 4193«, 4200. 
Pokegama quartzite, Grant, 2126, 2127, 213S. 
Pokegama quartzite, Wincnell, 6354, 6355, 6372. 
Polk Bayou limestone, Williams, 6191. 
Pondville group, Shaler, Woodworth, and 
Foerste, 4940. 
Porcupine beds, Spurr, 5173. 
Porous formation, Hill, 2549. 
Port Hudson, Harris and Veatch, 2318. 
