Rhyolitic lava is a highly viscous, silica-rich lava that typically forms steep-sided domes or flows. It is significant in volcanology for understanding the explosive nature of rhyolitic eruptions, the formation of volcanic domes, and the processes that lead to the buildup of pressure in magma chambers.
Reference: Macdonald, G. A. (1972). “Volcanoes.” Prentice Hall.