Ages for Opal at Placer Co., California, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 388Ma - 3.5Ma at this locality

• Locality age

• Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
  NAVDAT-130807	6	3.5				215816	Carnelian Bay, Tahoe District, Placer Co., California, USA	NAVDAT	NAVDAT
  NAVDAT-130898	3.97	3.69				85558	Marrs Mine, Westville, Westville District, Placer Co., California, USA	NAVDAT	NAVDAT
  podchrome-00131	388	388			Cr	85443	Hodge Ranch Occurrence, Alta, Dutch Flat District (Towle District), Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00132	388	388			Cr	85065	Beat Claim, Casa Loma, Dutch Flat District (Towle District), Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00133	388	388			Cr	85480	Julian Claims, Casa Loma, Dutch Flat District (Towle District), Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00134	388	388			Cr	85791	Snakehead Claim (Jumbo Claim; Snakebead [typo]), Casa Loma, Dutch Flat District (Towle District), Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00135	388	388			Cr	85975	West Chrome Mine (Knob Hill Prospect; West Prospect), Snakehead Point, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00136	388	388			Cr	85616	North Fork Chrome Mine, Snakehead Point, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00137	388	388			Cr	85711	Randall Claims Nos. 1 & 2, Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00138	388	388			Cr	85530	Long Pit & Yellow Pit Deposits (Long Pit; Yellow Pit Deposits), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00139	388	388			Cr	85121	Boiler Pit Mine (Victory Chrome Company Deposit; Sugar Pine Chrome Mines), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00140	388	388			Cr	85600	Mountain View Group (Manzanita Chrome Mine [1918]; Victory Chrome Company), Sage Hill, Michigan Bluff District (Michigan Bluff Deposit), Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00141	388	388			Cr	85315	Esther And Phyllis Mine (Esther & Phyllis), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00142	388	388			Cr	85687	Port Wine Mine, Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00143	388	388			Cr	85687	Port Wine Mine, Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00144	388	388			Cr	85161	Buzzard And Blue Jay Claims (Buzzard & Blue Jay), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00145	388	388			Cr	85107	Blue Bell And Bee Bee Claims (Blue Bell & Bee Bee Claims), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00146	388	388			Cr	85551	Maralls' Capco Leases Mine (Maralls Capco Leases), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00147	388	388			Cr	85551	Maralls' Capco Leases Mine (Maralls Capco Leases), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00148	388	388			Cr	85411	Green's Capco Leases Mine (Greens Capco), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00149	388	388			Cr	85411	Green's Capco Leases Mine (Greens Capco), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00150	388	388			Cr	85824	Sunset Mine (Sun Set Chrome Mine; Sugar Pine Chrome Mine), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00151	388	388			Cr	85798	Southern Pacific Property (Gore; Garrison; G.H.; Muller And Mathews Lease; Fitgerald And Russel Lease; Lookout; Bell Occurrence; King Occurrence), Hughes Mill, Forest Hill Divide Area, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00152	388	388			Cr	85152	Bunker Mine (Bunker Mines; Blue Bird Mine [1880's]; Bay Tree Prospect; Sunnyside Occurrence), Sage Hill, Michigan Bluff District (Michigan Bluff Deposit), Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00153	388	388			Cr	85968	Washout Claim, Bath, Forest Hill District, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00154	388	388			Cr	215876	Buttercup Chrome Occurrence, Lehigh Canyon Patent Property (Poco Tiempo Quartz Mine; Buttercup Chrome Occurrence), Bath, Forest Hill District, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00155	388	388			Cr	215875	Poco Tiempo Quartz Mine, Lehigh Canyon Patent Property (Poco Tiempo Quartz Mine; Buttercup Chrome Occurrence), Bath, Forest Hill District, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00156	388	388			Cr	85103	Black Rock Chrome Deposit, Foresthill, Forest Hill District, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00157	311	311			Cr	85348	Gas Canyon Claim, Todd Valley, Forest Hill District, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00158	311	311			Cr	85331	Fiddler's Green Deposit (Farmer Property), Todd Valley, Forest Hill District, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00159	204	204			Cr	85653	Parker Ranch Chromite Deposit (McNear Property; Meadowbrook Ranch; Auburn Chrome Mine), Hotaling, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  podchrome-00160	204	204			Cr	85096	Black Arrow Ranch Deposit, Hotaling, Placer Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
  USGS-Rb-Sr-05952	132	132				85233	Davenport Mine, Auburn, Ophir District (Auburn District; Duncan Hill District), Placer Co., California, USA	USGS-Rb-Sr	USGS-Rb-Sr
  vms-01028	170	170			S	85223	Dairy Farm Mine (Trent; Vantrent Mine), Kilaga Springs, Wheatland District, Placer Co., California, USA	Moiser et al. (2009)	USGSOFR2009_1034
  vms-01045	170	170			S	85950	Valley View Mine (Whiskey Hill Mine; Whiskey Diggings; Whislcey Diggings; Harpening Kilaga Springs; Harpending Mine; Bonanza [?]), Kilaga Springs, Wheatland District, Placer Co., California, USA	Moiser et al. (2009)	USGSOFR2009_1034