👉 A form of lava flow associated with Hawaiian-type volcanoes, consisting of basaltic rock, usually dark-colored with a jagged and loose, clinkery surface. Compare pahoehoe.
Alright class, settle down, let’s take a peek, At this word ‘aa,’ what does it mean, speak! The dictionary tells us, clear as can be, It's lava flow, for all to see. Specifically from volcanoes bright, Hawaiian-type, a wondrous sight! It’s basaltic rock, dark and bold, A story of the earth, ages old. With jagged edges, rough and free, And loose, clinkery – you'll agree! Think of it like this, if you please, ‘Aa’ is different from ‘pahoehoe,’ with ease! It's a contrasting flow, a textured treat, So remember 'aa,' can’t be beat! Any questions popping in your head? Don't delay, Let’s discuss this lava flow today!