The best time to visit South Korea. South Korea has four distinct seasons. The summer period from June to August sees hot and humid weather whereas winter, from December to February, is icy cold and dry. Autumn and spring are thought to be the best times to visit as they offer warm, sunny days with clear blue skies.
lunate. 1  Also, lunated. being in the shape of a crescent; crescent-shaped. 2  Anatomy. the second bone from the thumb side of the proximal row of bones of the carpus. 3  a crescent-shaped, microlithic artifact mounted in a haft to form a composite tool, mostly Mesolithic in origin.
The term âmassiveâ has several (although related) meanings in geology but here it means that the rock (obsidian is a rock type, not a mineral) is homogenous. It lacks layering, cleavage, foliation, phenocrysts, etc. It is just a piece of volcanic glass without further conditions. In the majority of cases obsidian solidified subaerially (on land). Volcanic glass that formed underwater has alternative names like tachylite and hyaloclastite.