Jindong Formation
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| Jindong Formation | |
|---|---|
| Stratigraphic range: Cenomanian-Turonian ~ | |
 | |
| Type | Geological formation |
| Unit of | Hayang Group |
| Underlies | Yucheon Group (volcanics) |
| Overlies | Haman Formation |
| Lithology | |
| Primary | Mudstone, siltstone |
| Other | Sandstone, shale |
| Location | |
| Coordinates | 35°24′N 128°24′E / 35.4°N 128.4°E |
| Approximate paleocoordinates | 44°42′N 122°54′E / 44.7°N 122.9°E |
| Region | Gyeongsangnam-do |
| Country | South Korea |
| Extent | Gyeongsang Basin |
  Jindong Formation (South Korea) | |
The Jindong Formation (Korean: 진동층; Hanja: 鎭東層; RR: Jindong-cheung) is a geological formation located in South Korea. It is dated to the Cenomanian-Turonian stages of the Late Cretaceous, between 99.9 ± 0.7 Ma and 93.1 ± 0.3 Ma.[1][2]
The Jindong Formation consists of thick, fine-grained, altered volcaniclastic sediments. Most of these sediments are ash-rich mudstone, siltstone, and very fine sandstone. There are also coarser sandstone, conglomerate, carbonates, and tuff. [3]