Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org

Ages for Graphite at New Hampshire, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 1261Ma - 171Ma at this locality

Age range from children

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
USGS-U-Th-Pb-00419_207_206	1261	1213	Zircon			9120	Bedford, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
AREPS5_257-00014	171	171				220659	Monadnock Mountain (Mount Monadnock), Lemington, Essex Co., Vermont, USA	Zartman (1977)	AREPS5_257

Locality age

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
Alexandra-0181	326	294	Zircon		3942	Palermo No. 1 Mine (Palermo No. 1 Pegmatite; Hartford Mine; GE Mine), Groton, Grafton Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
Alexandra-0189	341.82	340.66	Zircon		6000	Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
Alexandra-0190	272.1	265.9	Muscovite		6000	Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
Alexandra-0191	306.6	300.2	Muscovite		16181	Chickering Mine, Walpole, Cheshire Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
Alexandra-0193	188	178			5942	Hurricane Mountain Localities, North Conway, Conway, Carroll Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
Alexandra-0197	361	268	Zircon		9013	Parker Mountain Mine (Buzzo Mine; Foss Mine), Parker Mountain, Strafford, Strafford Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
Alexandra-0409	277	261	Muscovite		191878	Parker Mountain, Strafford, Strafford Co., New Hampshire, USA	Zartman et al. (1970)	GSAB81_3359
Alexandra-0410	338	318	Muscovite		6000	Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA	Zartman et al. (1970)	GSAB81_3359
Alexandra-0411	339	319	Muscovite		6343	Fletcher Mine, Groton, Grafton Co., New Hampshire, USA	Zartman et al. (1970)	GSAB81_3359
AREPS5_257-00006	197	197			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00007	194	194			234183	Cannon Mountain, Franconia, Grafton Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00013	171	171			8204	South Baldface Mountain Localities, Chatham, Carroll Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00016	165	165			6132	South Percy Peak Locality, Stratford, Coos Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00018	156	156			9082	Pine Mountain, Alton, Belknap Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00021	121	121			30144	Ossipee, Carroll Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00022	121	121			30115	Mount Pawtuckaway, Nottingham, Rockingham Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00033	171	171			6092	South Baldface Mountain Phenakite Locality (Charles Ravine Locality), Chatham, Carroll Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00034	171	171			9117	North Baldface Mountain Localities, Bean's Purchase, Coos Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00035	171	171			9393	Monadnock Mountain (Mount Monadnock), Jaffrey, Cheshire Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
AREPS5_257-00036	165	165			6133	North Percy Peak Locality, Stratford, Coos Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
Bradley_2012_068	342	340	Zircon		6000	Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA	McCauley and Bradley (2014)	CM52_183
USGS-Rb-Sr-00200	195.99	175.99			205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00201	188.14	170.14			205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00981	332.09	320.09	Muscovite		3281	Ruggles Mine, Grafton, Grafton Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00982	320.91	320.91			3281	Ruggles Mine, Grafton, Grafton Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01135	175.41	157.41			205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01770	201.6	195.2			30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01771	201.5	195.9			30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01774	201.6	195.2			30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01775	201.5	195.9			30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01790	200.9	196.5			30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01791	200.9	196.5			30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01792	200.9	196.5	Nepheline		30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01794	200.9	196.5	Sodalite		30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01795	200.9	196.5	Sodalite		30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01796	200.9	196.5			30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01797	200.9	196.5			30127	Horne Quarry, Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01803	201.6	195.2			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01804	206.4	184.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01805	201.6	195.2			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01806	206.4	184.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01807	201.6	195.2			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01808	206.4	184.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01809	201.6	195.2			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01810	206.4	184.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01817	188.6	186.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01818	188.6	186.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01819	188.6	186.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01820	188.6	186.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01821	188.6	186.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01822	188.6	186.4			16306	Red Hill, Moultonborough, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02173	175.67	157.67			205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02200	421.33	383.33			222734	Newbury, Merrimack Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-U-Th-Pb-00041_206_238	194.6	176.6	Zircon		205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00041_207_206	189.9	69.9	Zircon		205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00041_207_235	190.6	172.6	Zircon		205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00254_207_206	160	0			3281	Ruggles Mine, Grafton, Grafton Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00345_206_238	190.6	180.6	Zircon		205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00345_207_206	189.9	69.9	Zircon		205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00345_207_235	186.6	176.6	Zircon		205884	Redstone, Conway, Carroll Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00410_206_238	406	398	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00410_207_206	649	625	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00410_207_235	443	435	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00411_206_238	409	401	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00411_207_206	594	574	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00411_207_235	436	428	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00412_206_238	386	378	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00412_207_206	595	575	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00412_207_235	415	407	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00413_206_238	404	396	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00413_207_206	536	516	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00413_207_235	423	415	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00414_206_238	391	383	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00414_207_206	542	522	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00414_207_235	412	404	Zircon		22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00415_206_238	177	173			22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00415_207_206	293	285			22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00415_207_235	184	180			22967	Route 101/101A Road Cuts, Amherst, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00419_206_238	770	754	Zircon		9120	Bedford, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00419_207_206	1261	1213	Zircon		9120	Bedford, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00419_207_235	903	885	Zircon		9120	Bedford, Hillsborough Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01454_206_238	434	434	Zircon		28186	Surry, Cheshire Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01454_207_206	448	448	Zircon		28186	Surry, Cheshire Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01454_207_235	436	436	Zircon		28186	Surry, Cheshire Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01455_206_238	426	426	Zircon		28186	Surry, Cheshire Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01455_207_206	447	447	Zircon		28186	Surry, Cheshire Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01455_207_235	430	430	Zircon		28186	Surry, Cheshire Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
vms-01065	470	470		S	9212	Croydon Mountain Mine, Croydon, Sullivan Co., New Hampshire, USA	Moiser et al. (2009)	USGSOFR2009_1034
vms-01066	470	470		S	6001	Milan Mine (Nay-Fogg Mine; Copperville Mine), Milan, Coos Co., New Hampshire, USA	Moiser et al. (2009)	USGSOFR2009_1034
vms-01067	470	470		S	6134	Ore Hill Mine (Warren Silver-Lead Mine; Warren Zinc Mine), Warren, Grafton Co., New Hampshire, USA	Moiser et al. (2009)	USGSOFR2009_1034

Locality age (remote)

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
AREPS5_257-00014	171	171				220659	Monadnock Mountain (Mount Monadnock), Lemington, Essex Co., Vermont, USA	Zartman (1977)	AREPS5_257