OBOLID.E. 549 



County; (367k) sandstone at Deweys Bridge, Washington County; (110 and 110a) shaly calcareous sandstone resting 

 on massive layers of Potsdam sandstone, east side of the town of ^Tiitehall, Washington County; (338r [Billings, 

 1856, p. 34]) Potsdam sandstone at Keeseville, Essex County; (338s [Emmons, 1842, pp. 267 and '26S]) Potsdam sand- 

 stone at High Bridge, on Ausable River, Essex County; (77) sandstone at several horizons in the section below 

 the falls at the high bridge, in Ausable Chasm, Essex County; (111) at the top of the Potsdam sandstone on 

 Marble River, 1 mile (1.6 km.) south of Chateaugay, Franklin County; (338t) Potsdam sandstone in Ausable Chasm, 

 below Keeseville, Essex County; (338w [Hall, 1847, p. 4]) Potsdam sandstone at Hammond, St. Lawrence County; 

 (338j [Hall, 1847, p. 4]) Potsdam sandstone near Alexandria Bay, Jefferson County; (185) sandy layers above the 

 massive Potsdam sandstone one-half mile (0.8 km.) southeast of Redwood, Jefferson County; (185a) sandy layers 20 

 feet above the massive Potsdam sandstone, east side of Indian View, 3 miles (4.8 km.) south of Theresa, Jefferson 

 County; (367j) sandstone 3 miles (4.8 km.) south of Poughkeepsie, Dutchess County; (108) sandstone 1 mile (1.6 km.) 

 south of Poughkeepsie, Dutchess County; and (367e [Dwight, 1886, p. 205]) shaly limestones 850 feet (259.1 m.) southerly 

 from the southwest corner of the driving park and 2,200 feet (670.6 m.) west of the road leading southerly from the 

 same, about 1 mile (1.6 km.) southwest of Vassar College, near Poughkeepsie, Dutchess County; all in New York. 



(92b) Limestone on Buffalo Creek, 2 miles (3.2 km.) southeast of Buffalo Mills, Rockbridge County, Virginia. 



(105) Limestone in Knox dolomite, at Bishops Mill, Hancock County; and (107o) limestones and shales at the 

 base of the Knox dolomite, west of the top of Copper Ridge, near the Southern Railway cut, about 10 miles (16.1 km.) 

 northwest of Knoxville [Keith 1896b, areal geology sheet], Knox County; both in Tennessee. 



(79 and 79t)) "St, Croix sandstone" near Hudson, St. Croix County; (82 and 82s) "St. Croix sandstone" on the 

 bank of St. Croix River, St. Croix Falls, Polk County; (328h) silicocalcareous layers of Fib of Owen, at the falls 

 of the St. Croix, Polk County; (97a) "St. Croix sandstone" near Winfield, Jefferson County; (98) "St. Croix sand- 

 stone" near Eau Claire, Eau Claire County; and (99a) "St. Croix sandstone" near Pilot Knob, Adams County; all 

 in Wisconsin. 



(330 [Hall, 1851, p. 204]) Sandstone on Taquamenon Bay, Chippewa County; (330b) sandstone at Iron Mountain, 

 Dickinson County; and (330a [Hall, 1851, p. 204]) sandstone on Escanaba River; all in northern Michigan. 



(339h [Hall, 1863, p. 130]) "St. Croix sandstone " near the mouth of theMinneiska (Miniska) River, near the line 

 between Wabasha and Winona counties; and (97b) "St. Croix sandstone" below the greensand bed and about 25 

 feet above St. Croix River at Franconia, Chisago County; both in Minnesota. 



(353b) Sandstone just beneath the Ophileta zone, south end of the Franklin Range, El Paso Coimty, Texas. 



(360g) Shaly sandstone on Trout Creek, 1 mile (1.6 km.) below Manitou Park, El Paso County, Colorado. 



(54d) About 1,050 feet (320 m.) above the Middle Cambrian and 175 feet (53.3 m.) below the top of the Upper 

 Cambrian in the lower part of the limestone forming 1 of the St. Charles formation [Walcott, 190Sf, p. 192]; and (54g) 

 just above the Middle Cambrian, near the base of the bedded light-gray sandstone forming 4 of the St. Charles for- 

 mation [Walcott, 1908f, p. 193]; both in Blacksmith Fork Canyon about 10 miles (16.1 km.) east of Hyrum, Cache 

 County, Utah. 



(7x and 7y) Limestone of the Emigi'ant formation [Turner, 1902, p. 265], about 2.5 miles (4 km.) southeast of 

 Emigrant Pass; and (7z) limestone of the Emigrant formation [Turner, 1902, p. 265], about 3 miles (4.8 km.) southeast 

 of Emigrant Pass; both in the Silver Peak quadi-angle (U. S. Geol. Survey), Esmeralda County, Nevada. 



(9q) About 10 feet (3 m.) above the porphyry contact and 90 feet (27.4 m.) below the Arbuckle limestone in 

 limestone of the Reagan sandstone, middle of west half of sec. 2, T. 4 N., R. 13 W., about 15 miles (24.2 km.) north- 

 west of Fort Sill, Comanche County; (9s) about 85 feet (26 m.) below the Arbuckle limestone in the limestone of the 

 Reagan sandstone, near middle of west half of sec. 13, T. 4 N., R. 13 W., 13 miles (20.8 km.) northwest of Fort Sill, 

 Comanche County; (9v) limestone of the Reagan sandstone, about 250 feet (76 m.) below the Arbuckle limestone, 

 SW. i sec. 17, T. 4 N., R. 12 W., about 11 miles (17.7 km.) northwest of Fort Sill, Comanche County; (12n) lime- 

 stone of the Reagan sandstone (in the section 7 miles (11.2 km.) north of Springer this horizon is about 240 feet 

 (73 m.) above the porphjTy contact and 40 feet (12 m.) below the Arbuckle limestone), NW. J sec. 1, T. 2 S., R. 1 E., 

 Ardmore quadrangle (U. S. Geol. Survey), Carter County; and (12p) about 225 feet (69 m.) above the igneous rocks 

 in the limestone of the Reagan sandstone, at the northwest extremity of the Arbuckle Mountains, about 4 miles 

 (6.4 km.) east of Homer, Carter County; all in Oklahoma. 



(14b) Limestone on Cold Creek at north end of gorge opposite the north end of Sponge Mountain, 2 miles (3.2 

 km.) south of the San Saba County line in Llano County; (14r) sandstone in the lower part of the beds exposed on 

 Colorado River, 3 miles (4.8 km.) south of the northeast corner of Llano County; (69) limestone near Honey Creek, 

 Burnet County; and (70) limestone near Morgans Creek, Burnet County; all in Texas. 



Middle Cambrian : (328e) "St. Croix sandstone" at St. Croix Falls, Polk County; and (79x) "St. Croix sand- 

 stone" near the flour mill on Beaver Creek, north of Galesville, Trempealeau County; both in Wisconsin. 



(84) "St. Croix sandstone" at Dresbach, opposite the mouth of Black River, Winona County; (84s) "St. Croix 

 sandstone" near Dakota, Winona County; (339j) sandstone between the lowest blue shale and the reddish calcareous 

 beds above, at Taylors Falls, Chisago County; and (339k) sandstone near Winona, Winona County; all in Minnesota. 



(89) Limestone in Murphrees Valley, Blount County, Alabama. 



(374d) Shale 2 miles (3.2 km.) north of Rotherwood; and (124a) shale (Nolichucky?) overlying the limestone 

 which rests on the Rogersville shale, on Big Creek, southeast of Harlan Knob, 4 miles (6.4 km.) northeast of Rogers- 

 ville [Keith, 1905, p. 4, and areal geology sheet]; both in Hawkins County, Tennessee. 



