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 Covellite at Wisconsin, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 1830Ma - 1830Ma 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
vms-01080	1830	1830			S	25693	Crandon Massive Sulfide Deposit (Little Sand Lake Deposit; Crandon Project; Exxon Deposit), Little Sand Lake, Ladysmith-Rhinelander Metavolcanic Complex, Forest Co., Wisconsin, USA	Moiser et al. (2009)	USGSOFR2009_1034

Mineralization age

Excel ID	Max Age (Ma)	Min Age (Ma)	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
vms-01080	1830	1830	S	25693	Crandon Massive Sulfide Deposit (Little Sand Lake Deposit; Crandon Project; Exxon Deposit), Little Sand Lake, Ladysmith-Rhinelander Metavolcanic Complex, Forest Co., Wisconsin, USA	Moiser et al. (2009)	USGSOFR2009_1034
vms-01081	1820	1820	S	4496	Flambeau Mine, Ladysmith, Ladysmith-Rhinelander Metavolcanic Complex, Rusk Co., Wisconsin, USA	Moiser et al. (2009)	USGSOFR2009_1034
vms-01082	1835	1835	S	51825	Pelican River Massive Sulfide Deposit, Ladysmith-Rhinelander Metavolcanic Complex, Oneida Co., Wisconsin, USA	Moiser et al. (2009)	USGSOFR2009_1034

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
Be-00035	1760	1760		Hambergite, Londonite	Be	12662	Animikie Red Ace Pegmatite, Pine River Pegmatites, Fern, Florence Co., Wisconsin, USA	Sirbescu et al. (2008)	CMP156_289
Bradley_2012_031	1490	1410				144223	Nine Mile Pluton, Wausau Intrusive Complex, Marathon Co., Wisconsin, USA	McCauley and Bradley (2014)	CM52_183
Bradley_2012_157	1547	1525	Zircon			51806	Aspirus Quarry, Wausau Pluton, Wausau Intrusive Complex, Marathon Co., Wisconsin, USA	McCauley and Bradley (2014)	CM52_183
Jen_0000005	1500	1470	Zircon			4225	Wausau Intrusive Complex, Marathon Co., Wisconsin, USA	Černý (1991)	PR51_429
Jen_0000005a	1503	1433				4225	Wausau Intrusive Complex, Marathon Co., Wisconsin, USA	Černý (1991)	PR51_429
Jen_0000079	1485.015	1484.985	Zircon			51899	Waupaca Granite Quarry, Waupaca Co., Wisconsin, USA	Anderson (1983)	GSAM161_133
Jen_0000080	1456.034	1455.966				4225	Wausau Intrusive Complex, Marathon Co., Wisconsin, USA	Anderson (1983)	GSAM161_133
USGS-Rb-Sr-00258	1415.76	1275.76				47900	Mountain, Oconto Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00259	1612.45	1472.45				170327	Nellis Limestone Quarry (Ripon Quarry; Green Lake Ready Mix Company), Fond Du Lac Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01279	1617.72	1377.72				31428	Baxter's Hollow, Sampler, Sauk Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01280	1696.45	1416.45				31428	Baxter's Hollow, Sampler, Sauk Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01281	1657.08	1397.08				31428	Baxter's Hollow, Sampler, Sauk Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03385	1668.87	1590.87				170242	Mecan Rhyolite Quarry, Marquette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03386	1651.08	1589.08				170242	Mecan Rhyolite Quarry, Marquette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03387	1668.87	1590.87				170242	Mecan Rhyolite Quarry, Marquette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03388	1651.08	1589.08				170242	Mecan Rhyolite Quarry, Marquette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03409	1694.33	1522.33				216265	American Granite Company Quarries, Lohrville, Waushara Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03410	1651.08	1589.08				216265	American Granite Company Quarries, Lohrville, Waushara Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03411	1711.78	1627.78				216265	American Granite Company Quarries, Lohrville, Waushara Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03412	1655.28	1655.28				216265	American Granite Company Quarries, Lohrville, Waushara Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03413	1694.33	1522.33				222114	Redgranite, Waushara Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03414	1651.08	1589.08				222114	Redgranite, Waushara Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03415	1711.78	1627.78				222114	Redgranite, Waushara Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03416	1731.89	1731.89				222114	Redgranite, Waushara Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03435	1647.54	1457.54				169400	Cold Spring Wausau Quarry (Cold Spring Granite Company; Wausau Quarry; Bright Red Quarry), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03436	1603.92	1557.92				169400	Cold Spring Wausau Quarry (Cold Spring Granite Company; Wausau Quarry; Bright Red Quarry), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03437	1711.78	1627.78				169400	Cold Spring Wausau Quarry (Cold Spring Granite Company; Wausau Quarry; Bright Red Quarry), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03438	1677.02	1677.02				169400	Cold Spring Wausau Quarry (Cold Spring Granite Company; Wausau Quarry; Bright Red Quarry), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03439	1647.54	1457.54				171243	Wisconsin Rose Red Quarry (Lake Wausau Granite Company), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03440	1603.92	1557.92				171243	Wisconsin Rose Red Quarry (Lake Wausau Granite Company), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03441	1711.78	1627.78				171243	Wisconsin Rose Red Quarry (Lake Wausau Granite Company), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03442	1692.55	1692.55				171243	Wisconsin Rose Red Quarry (Lake Wausau Granite Company), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03443	1647.54	1457.54				170184	Mahogany Quarry (Anderson Brothers & Johnson Company), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03444	1603.92	1557.92				170184	Mahogany Quarry (Anderson Brothers & Johnson Company), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03445	1711.78	1627.78				170184	Mahogany Quarry (Anderson Brothers & Johnson Company), Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03463	1821.81	1721.81				51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03464	1716.01	1716.01				51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03465	1821.81	1721.81				51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03466	1697.41	1697.41				51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03477	1620.97	1536.97				51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03478	1641.62	1641.62				51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03486	1475.2	1475.2				51806	Aspirus Quarry, Wausau Pluton, Wausau Intrusive Complex, Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03487	1415.49	1415.49				51806	Aspirus Quarry, Wausau Pluton, Wausau Intrusive Complex, Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03507	1471.03	1403.03				170583	Red Granite Road Granite Quarry, Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03518	1406.68	1406.68				51810	Mosinee Hill Quarry, Wausau Intrusive Complex, Marathon Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04455	1950	1820				51843	Big Falls Dam, Rusk Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-06980	2343	1539				51636	Hamilton Mound, Adams Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-06981	1735	1429				51636	Hamilton Mound, Adams Co., Wisconsin, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-U-Th-Pb-00112_206_238	1122.9	1090.9	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00112_207_206	1791.6	1737.6	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00112_207_235	1373.2	1331.2	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00113_206_238	1229.1	1193.1	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00113_207_206	1790.7	1736.7	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00113_207_235	1447.2	1405.2	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00114_206_238	845.9	821.9	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00114_207_206	1711.4	1663.4	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00114_207_235	1122.4	1088.4	Zircon			51821	Mt. Tom Quarry (Middle Inlet Quarry), Middle Inlet Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00122_206_238	997.8	967.8	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00122_207_206	1703.1	1653.1	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00122_207_235	1241.9	1205.9	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00123_206_238	1002.7	972.7	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00123_207_206	1706.9	1654.9	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00123_207_235	1246.8	1210.8	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00124_206_238	1077.2	1047.2	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00124_207_206	1738.2	1686.2	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00124_207_235	1317.9	1277.9	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00125_206_238	806.2	782.2	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00125_207_206	1613.8	1565.8	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00125_207_235	1051.3	1021.3	Zircon			263330	Niagara Township, Marinette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00397_206_238	1498	1498	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00397_207_206	1765	1765	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00397_207_235	1612	1612	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00398_206_238	1448	1448	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00398_207_206	1754	1754	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00398_207_235	1577	1577	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00778_206_238	1565	1565	Zircon			170242	Mecan Rhyolite Quarry, Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00778_207_206	1739	1739	Zircon			170242	Mecan Rhyolite Quarry, Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00778_207_235	1640	1640	Zircon			170242	Mecan Rhyolite Quarry, Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00780_206_238	1410	1410	Zircon			170437	Own Crews (MRDS - 10278010), Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00780_207_206	1737	1737	Zircon			170437	Own Crews (MRDS - 10278010), Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00780_207_235	1546	1546	Zircon			170437	Own Crews (MRDS - 10278010), Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00781_206_238	1219	1219	Zircon			170437	Own Crews (MRDS - 10278010), Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00781_207_206	1704	1704	Zircon			170437	Own Crews (MRDS - 10278010), Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00781_207_235	1407	1407	Zircon			170437	Own Crews (MRDS - 10278010), Marquette Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00794_206_238	1569	1569	Zircon			169228	Black River Falls, Jackson Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00794_207_206	1819	1819	Zircon			169228	Black River Falls, Jackson Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00794_207_235	1679	1679	Zircon			169228	Black River Falls, Jackson Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00795_206_238	1165	1165	Zircon			169228	Black River Falls, Jackson Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00795_207_206	1774	1774	Zircon			169228	Black River Falls, Jackson Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00795_207_235	1398	1398	Zircon			169228	Black River Falls, Jackson Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00796_206_238	1740	1740	Zircon			51677	Little Falls, Eau Claire Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00796_207_206	1839	1839	Zircon			51677	Little Falls, Eau Claire Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00796_207_235	1785	1785	Zircon			51677	Little Falls, Eau Claire Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00797_206_238	1700	1700	Zircon			51677	Little Falls, Eau Claire Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00797_207_206	1842	1842	Zircon			51677	Little Falls, Eau Claire Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00797_207_235	1765	1765	Zircon			51677	Little Falls, Eau Claire Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00811_206_238	1494	1494	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00811_207_206	1772	1772	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00811_207_235	1613	1613	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00812_206_238	1427	1427	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00812_207_206	1756	1756	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00812_207_235	1565	1565	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00814_206_238	1448	1448	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00814_207_206	1754	1754	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00814_207_235	1577	1577	Zircon			107406	Stevens Point, Portage Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01275_206_238	1835	1835	Zircon			51676	Big Falls, Eau Claire Co., Wisconsin, USA	USGS-U-Th-Pb	USGS-U-Th-Pb