Also known as Keizan,Hesanjin,Keisanchin,Keizanchin,Keizantin,Hyesanjin

Where: North Korea (41.4° N, 128.2° E: paleocoordinates 4.8° S, 128.3° E)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Chikunsan Formation, Early/Lower Llandeilo (466.0 - 460.9 Ma)

• Upper Abereiddian (Darwillian)

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Primary reference: T. Kobayashi. 1934. The Cambro-Ordovician formations and faunas of south Chosen. Paleontology. Part I. Middle Ordovician faunas. Journal of the Faculty of Science, the Imperial University of Tokyo, Section 2 3(8):335-519 [P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 56174: authorized by Pete Wagner, entered by Pete Wagner on 14.11.2005

Creative Commons license: CC BY (attribution)