Mineralogy of the basalt lava throughout the length of the biggest and longest columns.

Acicular plagioclase in a glass groundmass. PPL

Acicular plagioclase dominated. Only a small % of pyroxene and rare opaques. PPL

Olivine is almost absent. Dominance of acicular plagioclase in a microcrystalline pyroxene groundmass, with few opaques. PPL

Less abundant olivine flowers and greater % of pyroxene and plagioclase microlites. PPL

Abundant flowers of olivine, and plagioclase microlites. Microcrystalline pyroxene and opaques. PPL