Jinju Formation

The Jinju Formation is an Early Cretaceous geologic formation in South Korea. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus. It has been dated to the Albian stage. It predominantly consists of black shale, interbedded with sandstone packets, deposited in a fluvial-lacustrine setting. 
A diverse spider fauna is known from the formation, including indeterminate mygalomorphs and palpimanoids as well as two species of lagonomegopid belonging to the genera "Koreamegops" and "Jinjumegops". Other compression fossils known from the formation include a species of the zhangsolvid fly "Buccinatormyia" and elaterid beetle "Koreagrypnus."