40Ar/39Ar laser probe evidence concernin
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G. Brent Dalrymple; John P. Lockwood
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Article
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1990
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Springer Netherlands
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English
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The waters of Lake Nyos are impounded by a fragile natural dam composed of pyroclastic rocks ejected during the formation of the lake crater (maar). Lateral erosion of this dam has reduced its width from over 500 m to only 45 m. Published whole-rock K-Ar ages of about 100 ka on juvenile basalt from