Jinju Formation

The Jinju Formation (Korean: 진주층; Hanja: 晋州層; RR: Jinju-cheung) is an Early Cretaceous geologic formation in South Korea.[1] Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.[2] It has been dated to the Albian stage.[3] It predominantly consists of black shale, with sandstone packets, deposited in a fluvial-lacustrine setting.

Jinju Formation
Stratigraphic range: Albian
Type	Geological formation
Unit of	Shindong Group
Underlies	Chilgog Formation, Iljig Formation
Overlies	Hasandong Formation
Thickness	1,000–1,800 m (3,300–5,900 ft)
Lithology
Primary	Shale
Other	Sandstone
Location
Coordinates	35.1°N 128.1°E / 35.1; 128.1
Approximate paleocoordinates	44.3°N 122.7°E / 44.3; 122.7
Region	North Gyeongsang Province
Country	South Korea
Extent	Gyeongsang Basin(ko:경상 분지)
Jinju Formation (South Korea)

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.[4] Other compression fossils known from the formation include a species of the zhangsolvid fly Buccinatormyia, the elaterid beetle Koreagrypnus, and the ichthyodectiform fish Jinjuichthys.