The total alkali-silica (TAS) diagram is a scatterplot of the chemical concentrations of silica oxide (SiO2) versus total alkali-sodium oxide (Na2O) plus potassium oxide (K2O) – in volcanic rocks.
- Digital Object Identifier: 10.1007/978-3-030-26050-7
- Source: USGS Publications Warehouse (indexId: 70226500)