Sanaegol locality - SN731 (Ordovician of South Korea)

Also known as near Taebaeg (Taebaek), Taebaeksan Basin

Where: Kangweondo (Gangwon-do), South Korea (37.1° N, 128.9° E: paleocoordinates 3.0° S, 136.2° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Maggol Formation (Taebaek Group), Arenig (478.6 - 466.0 Ma)

• Bed 731 is in the middle part of the Maggol Fm., about 70 m below base of Jigunsan Fm. (Yun, 1999 fig. 2). The Maggol Formation is a subunit of the Taebaek Group and is largely Arenigian in age (see Kwon, 2005, Geosci. J. 9(4)).

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; bioturbated limestone

• "Based on sedimentary structures such as desiccation cracks, ripple marks, bird's-eye structures, and bioturbation, Paik (1985, 1987, 1988) suggested tidal flats as the depositional environments of the Maggol Formation." (Yun, 1999). According to Woo (1999, Geosci. J. 3(3)) bioturbated limestones represent the subtidal to lowermost intertidal facies within the peritidal shallowing-upward cycles of the Maggol Fm.
• "Lithologic components of the formation consist of bioturbated limestone, well bedded limestone and bioclastic limestone with frequent intercalations of dolomite and dolomitic limestone. Flat pebble conglomerates are included in the lower part of the formation, but they were not observed in the section examined." (Yun, 1999). The lithology of bed 731 is "bioturbated limestone" according to stratigraphic log in fig. 2 in Yun (1999).

Size class: macrofossils

Preservation: cast, recrystallized, replaced with calcite

Collection methods: KPE = Department of Earth Science, Teachers College, Kyungpook National University, Taegu, South Korea

Primary reference: C.-S. Yun. 1999. Ordovician cephalopods from the Maggol Formation of Korea. Paleontological Research 3(3):202-221 [B. Kröger/T. Liebrecht/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 89517: authorized by Björn Kröger, entered by Torsten Liebrecht on 27.05.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Orthocerida - Proteoceratidae
"Kogenoceras nanpiaoense" = Tofangoceras
"Kogenoceras nanpiaoense" = Tofangoceras
KPE 20208, 20210