The American Journal of Science, Band 274,Ausgaben 1-5

acicular activity albite andesite anthophyllite assemblage atmosphere basalt biotite buffer calcite calcium calculated carbon channel chemical clinopyroxene CO₂ components composition constant continental continental-type curves dendrites diagram diffusion dissolution eclogites enstatite enthalpies entropy equation equilibrium erosion experimental fauna figure formation free energy fugacity garnet Geol Geology Geophys grains H₂O Hirnantian hydrothermal increase invariant point island arcs isobaric Jour kinetics Lake Chatuge lavas liquid magmas magnesium magnetite meander melt metamorphism Mg-calcite MgCO minerals mole percent mole-¹ morphology muscovite nucleation Ordovician oxygen paleomagnetic Paleozoic paragonite Petrology phase plagioclase plate plots polarity pyroxene quartz ratio reaction River samples sanidine sediments series rocks shown silicate sillimanite Silurian skeletal solid solution solidus solubility spherulites stability stratigraphic surface Tabular talc tectonic temperature TH series thermodynamic tion total pressure univariant values vapor volcanic rocks volcanic zone Waldbaum Wyllie