kw.\*:("IDAHO SPRINGS FORMATION")
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A LITHIUM-BEARING PEGMATITE IN THE CLEAR CREEK DISTRICT, CLEAR CREEK COUNTY, COLORADO = UNE PEGMATITE A LITHIUM DANS LE DISTRICT DE CLEAR CREEK, COMTE DE CLEAR CREEK, COLORADOJACOBSON MARK I; TILANDER NATHANIEL G.1982; ROCKS MINER.; ISSN 0035-7529; USA; DA. 1982-12; VOL. 57; NO 6; PP. 241-244; BIBL. 4 REF.; ILL.Article
NEW K-AR AGES FROM THE ELDORA-BRYAN STOCK AND IDAHO SPRINGS FORMATION, FRONT RANGE, COLORADO = NOUVELLES DATATIONS K-AR DU STOCK ELDORA-BRYAN ET DE LA FORMATION IDAHO SPRINGS, FRONT ROUGE, COLORADOBROOKINS DOUGLAS G; ABASHIAN MARK S.1981; ISOCHRON/WEST; ISSN 0099-6882; USA; DA. 1981-12; NO 32; PP. 17-18Article
PRECAMBRIAN TUNGSTEN AND COPPER-ZINC SKARN DEPOSITS OF SOUTH-CENTRAL COLORADO = SKARNS TUNGSTENIFERES ET CUPRO-ZINCIFERES PRECAMBRIENS DU CENTRE-SUD DU COLORADOHEINRICH E WM.1981; RESOUR. SER. - COLO. GEOL. SURV., DEP. NAT. RESOUR., STATE COLO.; ISSN 0197-7490; USA; DA. 1981; VOL. 21; 115; BIBL. 93 REF.; ILL.Serial Issue