Also known as Isaacson field loc. 121

Where: La Paz, Bolivia (17.1° S, 68.0° W: paleocoordinates 63.5° S, 88.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lower Belen Member (Belen Formation), Emsian (409.1 - 391.9 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; mudstone

Primary reference: P. E. Isaacson. 1977. Devonian stratigraphy and brachiopod paleontology of Bolivia. part A: Orthida and Strophomenida. Palaeontographica Abteilung A 155(5-6):133-192 [M. Foote/M. Foote/M. Foote] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 36027: authorized by Michael Foote, entered by Michael Foote on 13.01.2004