Also known as Belen and Paraja Bobo

Where: Peru (4.7° S, 81.2° W: paleocoordinates 10.9° S, 107.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Cone Hill Formation (Chira Group), Priabonian (38.0 - 33.9 Ma)

• Olsson placed these fossils within the Heath Formation (now considered Early Oligocene - Higley, 2004), but the area is mapped as undivided Chira-Verdun Formations by Palacios (1994). Olsson also described them as the "Cone Hill Facies," which Palacios (1994) considers to be the upper unit of the Chira Formation (p. 42) or the upper formation of the Chira Group (column on p. 19). Palacios (1994) also mentioned Pleurophopsis as indicative of the Cone Hill Formation, after Stainforth (1954). The shales at Pajaro Bobo were also called the "Pajaro Bobo Formation" by Wiedey & Frizzell (1940) and considered to be equivalent to the Heath Formation; however, Cushman & Stone (1947) restudied the foraminiferal fauna and determined a late Eocene age. The Chira contains diatoms indicative of a latest Eocene age (Marty et al., 1988; Koizumi, 1992), regional Upper Eocene planktonic foraminifera as Hantkenina primitiva, Globigerina mexicana, Globigerina topilensis, and Guembelina venezuelana (Weiss, 1955) including in the Cone Hill Formation (Eames et al., 1962), and radiolarians of the C. azyx (RP17) or C. bandyca (RP18) zones (Marty, 1989) - all of which indicate a Priabonian age.

• group of beds-level stratigraphic resolution

Environment/lithology: deep-water; lithified, yellow limestone and calcareous shale

Size class: macrofossils

Primary reference: A. A. Olsson. 1931. Contributions to the Tertiary Paleontology of Northern Peru: Part 4, The Peruvian Oligocene. Bulletins of American Paleontology 17(63) [L. Ivany/L. Ivany]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 58685: authorized by Mark Uhen, entered by Mark Uhen on 20.02.2006, edited by Linda Ivany

Creative Commons license: CC BY (attribution)