👉 Cryoconite, also known as cryoconiferous or cryocarbone, is a type of volcanic rock composed primarily of quartz and feldspar. It was formed during the Cretaceous-Tertiary (K-T) period, approximately 65 to 70 million years ago, when Earth's climate underwent significant changes due to the cooling of the planet by the impact of meteorites. Cryoconite rocks are distinguished from other types of volcanic rock by
