re: #85 ggt
ʻAʻā
ʻAʻā (also spelled aa, aʻa, ʻaʻa, and a-aa; /ˈɑː.ɑː/ or /ˈɑːʔɑː/, from Hawaiian [ʔəˈʔaː][6] meaning “stony rough lava”, but also to “burn” or “blaze”) is one of three basic types of flow lava. ʻAʻā is basaltic lava characterized by a rough or rubbly surface composed of broken lava blocks called clinker. The Hawaiian word was introduced as a technical term in geology by Clarence Dutton.[7]