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Updated: May 8, 2025
As far as he was able to travel inland, the surface was composed of secondary limestone, partially covered with a thin layer of calc-sinter. From the scantiness of the vegetation here, the limestone seemed likely to contain a large proportion of magnesia. Dr.
The hollows in some of the fragments of vesicular lava of which the breccias and conglomerates are composed are partially filled with calc-sinter, being thus half converted into amygdaloids.
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