Political verse

Political verse (Greek: politikós stíkhos, πολιτικός στίχος), also known as decapentasyllabic verse (from Greek: dekapentasíllavos, δεκαπεντασύλλαβος, lit. '15-syllable'), is a common metric form in Medieval...

Lamproite

Lamproite is an ultrapotassicmantle-derived volcanic or subvolcanic rock. It has low CaO, Al2O3, Na2O, high K2O/Al2O3, a relatively high MgO content and extreme enrichment in...