Bed of black ash overlain by bed of white ash (diatomaceous?) from old lake bottom (?) in which aquatic plants were buried in growth position, died, decayed, and molds of their stems were filled up by wet black ash forced up from below (?).
Dates
Date Taken
1950
Summary
Bed of black ash overlain by bed of white ash (diatomaceous?) from old lake bottom (?) in which aquatic plants were buried in growth position, died, decayed, and molds of their stems were filled up by wet black ash forced up from below (?). Note black streaks in white bed overlying black bed. East side of Culapachan canyon, road cut, Ambato-Pillaro road. Tungurahua, Ecuador. 1950.
Summary
Bed of black ash overlain by bed of white ash (diatomaceous?) from old lake bottom (?) in which aquatic plants were buried in growth position, died, decayed, and molds of their stems were filled up by wet black ash forced up from below (?). Note black streaks in white bed overlying black bed. East side of Culapachan canyon, road cut, Ambato-Pillaro road. Tungurahua, Ecuador. 1950.
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