Complex sentence: Magnetite crystals and those of titanite in the Kuna Crest granodiorite are usually euhedral, occur in aggregates; consequently, they are interpreted to be early phases (primocrysts) that crystallized together.
Split into simpler sentences: Magnetite crystals and those of titanite in the Kuna Crest granodiorite are usually euhedral, and occur in aggregates. So, they are interpreted to be early phases (primocrysts) that crystallized together.