They substantiated, based on geochemistry, that the lavas were derived by subduction (calc-alkaline).
en.wikipedia.org For example, many metamorphic limestones, marbles, and calc-schists, with crystalline dolomites, contain silicate minerals such as mica, tremolite, diopside, scapolite, quartz and feldspar.
en.wikipedia.org The pyroxenite outcrops are dark and massive and include discontinuous calc-silicate bands, some of brown mica and others with calcite.
en.wikipedia.org It contains a rich range of stalactites, including very slender examples and extremely conical stalagmites, flags of calc-sinter, terraces of calc-sinter and crystals.
en.wikipedia.org He then heated the mercuric calc and measured the amount of air released and discovered the quantities were the same.
en.wikipedia.org