Machari Formation (Cambrian of South Korea)

Where: South Korea (37.2° N, 128.5° E: paleocoordinates 2.8° N, 144.6° E)

• outcrop-level geographic resolution

When: Glyptagnostus stolidotus zone, Machari Formation, Maentwrogian (497.0 - 496.8 Ma)

• The Machari Formation attains a thickness of 400 meters.

•The paper only depicts the occurrence of Glyptagnostus stolidotus, thus it belongs to the Glyptagnostus stolidotus zone.

• formation-level stratigraphic resolution

Environment/lithology: marine; black, gray shale and limestone

• dark gray to black laminated shale with occasional intercalations of thin dolomitic limestone beds. specimes collected from the shale beds, 53-61 meters above the thrust contact between the machari formation and the permo-carboniferous strata in the measured section.

Size class: macrofossils

Collection methods: bulk,

• All specimens are reposited in the paleontological collections of Seol National University, Korea.

Primary reference: D. K. Choi and J. G. Lee. 1995. Occurrence of Glyptagnostus stolidotus Opik, 1961 (Trilobita, Late Cambrian) in the Machari Formation of Korea. Journal of Paleontology 69(3):590-594 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 7890: authorized by Mark Patzkowsky, entered by Zack Krug on 05.06.2000, edited by Phil Borkow

Creative Commons license: CC BY (attribution)

Taxonomic list

 Agnostida - Diplagnostidae
Pseudagnostus sp. Jaekel 1909
 Agnostida - Agnostidae
 Agnostida -
 Agnostida - Clavagnostidae
Aspidagnostus sp. Whitehouse 1936
 Agnostida - Spinagnostidae
 Olenida - Olenidae