Table 3. General qualitative description of diagnostic features for the flow types aa and pahoehoe.
| Diagnostic features | Aa | Pahoehoe |
|---|---|---|
Density |
High |
Low |
Velocity |
High |
Low |
Susceptibility |
High |
Low |
Magnetic intensity |
Low |
High |
Crystal grain size |
Fine |
Medium coarse |
Vent location |
Distal |
Proximal |
Eruption rate |
High |
Low |
Thickness |
Thick |
Thin |
Viscosity |
High |
Less |
Note: Table in part taken from Walker, 1971; Sahagian et al., 1989; Rowland and Walker, 1990; Hon et al., 1994.