Olistolite LST3 (Cambrian of Argentina)

Also known as Olistolite LST3, Total Range, San Juan, Argentina - Shergold et. al 1995

Where: San Juan, Argentina (31.6° S, 68.5° W: paleocoordinates 41.1° S, 126.5° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Glyptagnostus reticulatus trilobite zone, Los Sombreros Formation (Los Sombreros Group), Idamean (497.0 - 494.0 Ma)

• Sequence of almost 1,000m thick, Ordovician depositional age, although olistolite is Cambrian.

Environment/lithology: offshore ramp; lithified, conglomeratic, calcareous shale and lithified limestone

• Cambrian material is Precordilleran
• talus association of shale and thinly bedded limestone with olistolites, olistostomes, calcareous breccias and channel conglomerates.

Size class: macrofossils

Preservation: original calcite

Collection methods: The Bondonaro Collection has been split into six subcollections in order to include the lithology/locality data for individual olistolites.

Primary reference: J. H. Shergold, O. Bordonaro, and E. Linan. 1995. Late Cambrian Agnostoid trilobites from Argentina. Palaeontology 38(2):241-257 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9932: authorized by Mark Patzkowsky, entered by Phil Borkow on 01.02.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

 Agnostida -
Glyptagnostus reticulatus Angelin 1851
3 cephala and 2 pygidia