Direct Answer • Key Takeaway
Andesitic Lava Is an Example of a High Viscosity Lava Whereas Balastic Lava Has a Low Viscosity, So Is More Runny. High Silica Content in the Andesitic Lava Contributes to Causing This High Viscosity and Low Silica Content in the Basaltic Lava Means It Is of a Lower Viscosity.