Aphanite Info

: They are often composed of very small crystals of minerals like plagioclase feldspar, augite, or hornblende.

Aphanites are typically (volcanic) rocks. Their signature microscopic structure is the result of rapid cooling: aphanite

: Because they form near the surface, they may contain small holes (vesicles) created by escaping gas bubbles during the cooling process. APHANITE Definition & Meaning - Dictionary.com : They are often composed of very small