Quadrangle Name	Scale 1:	Coverage & Subject	Source
Oak City 15'		see: Harding, Oak City North, : Oak City South, Strong
Ochre Mtn.	63k	complete	P 177 pl.3
Ochre Mtn.	63k	complete	P 177 pl.1
Ogden	24k	S ¼	MF 428
Ogden	63k	SW 3/4	P 518 pl.1
Ogden	100k	complete	Ums 53A
Ogden	100k	complete	MF 1198
Ogden Bay	63k	NE 1/2	P 518 pl.1
Ogden Bay	100k	complete	Ums 53A
Ogden Bay	100k	complete	MF 1198
Old Canyon	125k	complete	B 923 pl.1
Old Woman Plateau	42k	complete	Um 3 fig.27 p.149
Old Woman Plateau	42k	S 1/3	Ub 112 pl.2
Old Woman Plateau	42k	S 1/3	Uo 17 fig.7&12
Old Woman Plateau	62k	NW 1/4	B 796 pl.22
Old Woman Plateau	63k	complete	B 819 pl.32
Old Woman Plateau	63k	SE 1/4 [coal]	B 628 pl.X
Old Woman Plateau	63k	SE 1/4 [coal]	Ur 28 map 1
Old Woman Plateau	63k	E 3/4  [coal]	Ur 20
Old Woman Plateau	125k	SE 1/4, coal	B 628 pl.XII
Old Woman Wash	63k	complete	B 951 pl.2
Old Woman Wash	125k	complete	OM 55
Old Woman Wash	125k	NW 1/4	B 1239 pl.2
Oljeto	19k	SW 1/4	B 1087d pl.14
Oljeto	25k	E 1/2	B 1087d pl.11
Oljeto	48k	complete	B 1087d pl.10
Oljeto	96k	complete	B 865 pl.1
Oljeto	125k	complete	P 521a pl.1
Oljeto	125k	N 1/2	W 538 pl.XV
Oljeto	125k	N 1/3	B 751d pl.XV
Oljeto 15'		see: Oljeto, Oljeto NE, Jacobs Monument, Monitor Butte
Oljeto NE	24k	complete	I 65
Oljeto NE	48k	complete	B 1087d pl.10
Oljeto NE	96k	complete	B 865 pl.1
Oljeto NE	125k	complete	W 538 pl.XV
Oljeto NE	125k	complete	B 751d pl.XV
Oljeto NE	125k	complete	P 521a pl.1
Olsen Res.	24k	complete	I 100
Olsen Res.	62k	NE 1/4	B 711 pl.1
Olsen Res.	125k	complete [coal]	B 628 pl.XII
Onaqui Mountains South	48k	complete	MF 921
Ophir	50k	complete	Us 51 pl.IIIb
Ophir	62k	complete	P 173 pl.12
Orange Cliffs  1		see: Horsethief Canyon
Orange Cliffs  2		see: Sugarloaf Butte
Orange Cliffs  3		see: Whitbeck Knoll
Orange Cliffs  3 NE		see: The Pinnacle
Orange Cliffs  4		see: Point of Rocks East
Orange Cliffs  5		see: Angels Point
Orange Cliffs  6		see: Robbers Roost Flats
Orange Cliffs  7		see: Head Spur
Orange Cliffs  8		see: Cleopatras Chair
Orange Cliffs  9		see: Elaterite Basin
Orange Cliffs 10		see: Gordon Flats
Orange Cliffs 11		see: The Pinnacle
Orange Cliffs 12		see: Burr Point
Orange Cliffs 13		see: Stair Canyon
Orange Cliffs 14		see: Fiddler Butte
Orange Cliffs 15		see: Clearwater Canyon
Orange Cliffs 15'		see: Clearwater Canyon, Elaterite Basin,  Gordon Flats, Teapot Rock
Orange Cliffs 16		see: Tea Pot Rock
Orderville	42k	complete	Um 1 fig.24 p.325
Orderville	62k	N 1/4	P 417c pl.1
Orderville	63k	complete	I 494
Orderville	63k	N 3/4	CI 49
Orderville	125k	complete	P 220 pl.2
Orderville	125k	complete	Uw 5
Orderville 15'		see: Glendale, Long Valley Junction, Orderville, Strawberry Point
Orderville Canyon NE		see: Straight Canyon
Orderville Canyon NW		see: Cogswell Point, Slickrock Bench
Orderville Canyon SE		see: Clear Creek Mtn.
Orderville Canyon SW		see: Orderville
Orderville NE		see: Long Valley Junction
Orderville SE		see: Glendale
Orem	12k	W 1/4	P 257a fig.6
Orem	24k	complete	GQ 241
Orem	36k	E 1/4  [clay]	Ub 55 fig.15
Orem	46k	NW 1/4  [clay]	Ub 55 fig.18
Orem	62k	SW 1/2	P 257a pl.1
Orem	62k	W 1/2	P 257 pl.1
Orem	62k	W 1/2 [eng. geol.]	P 257 pl.2
Orem	100k	complete	Ums 55A
Orem	100k	complete [geol & mineral reserves]	Ums 55D
Orem	105k	NE ¼ [lithology]	Ur 96 fig.2
Orem 15'		see: Aspen Grove, Bridal Veil Falls, Orem, Timpanogos Cave
Ouray	50k	complete	GP 127
Ouray	64k	NW 1/3	OM 171 sh.2
Ouray	125k	complete	Ub 72
Ouray	125k	complete	Ums 16
Ouray	125k	complete [structure contours]	I 1156
Ouray SE	50k	complete	GP 127
Ouray SE	125k	complete	Ub 72
Ouray SE	125k	complete	Ums 16
Ouray SE	125k	complete [structure contours]	I 1156
Oweep Creek	125k	complete	P 61 pl.IV
Oweep Creek	125k	complete	B 1230i pl.1