Birkeland, PW 1973: Use of relative age-dating methods in a stratigraphic study of rock glacier deposits, Mt. Sopris, Colorado. - Arctic Alpine Res.5: 401-416. [RLL List # 88 / Rec.# 1985] Keywords: AGE-DATING / LICHENOMETRY / MT. SOPRIS / ROCK GLACIER / COLORADO / USA
Abstract: [Lichenometric study.]
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