rhyolites

the volcanic landscape was dominated by extensive flows of rhyolites.

geologists studied the chemical composition of the rhyolites to understand their origin.

rhyolites often form in areas with significant continental crust.

the presence of rhyolites indicates a felsic magma source.

we observed porphyritic rhyolites with large phenocrysts of quartz.

the researchers analyzed the rhyolites for trace element content.

rhyolites can be highly viscous due to their high silica content.

the eroded remnants of ancient rhyolites formed colorful mesas.

we collected samples of altered rhyolites from the hydrothermal system.

the team mapped the distribution of rhyolites across the volcanic field.

paleoproterozoic rhyolites are common in the wyoming province.