https://www.usgs.gov/publications/distinguishing-palagonitized-pedogenically-altered-basaltic-hawaiian-tephra
Distinguishing palagonitized from pedogenically-altered basaltic Hawaiian tephra: Mineralogical and...
Palagonitization is a common, but imperfectly defined process that greatly modifies the physical and chemical properties of glassy basaltic tephra deposited in...
distinguishingpalagonitizedalteredbasaltichawaiian