The overall anorthite content of rhyolite, obsidian and dacite samples were An 30-64, An 18-60 and An 43-74 for the mineral cores.
Heildar anorthít samsetning plagíóklas í líparíti, hrafntinnu og dasíti reyndust vera An 30-64, An 18-60 og An 43-74 fyrir kjarna steindarinnar.