Also known as Laguna Chillhué

Where: La Pampa, Argentina (37.7° S, 63.5° W: paleocoordinates 37.9° S, 61.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Huayquerian mammal zone, Cerro Azul Formation, Huayquerian (8.0 - 5.0 Ma)

• Schmidt et al. 2018: Figure 2 illustrates the stratigraphic distribution of the locality giving a general age estimate of 7.5-8.0Ma.

•

•Sostillo et al. 2018: The Cerro Azul Formation deposits (Linares et al., 1980)

•are discontinuous along the whole occupied area in the provinces of La Pampa and Buenos Aires (Fig. 2). They are composed of silts, sandy silts and very thin silty sands, reddish and brown colored, with a homogeneous and com- pact general aspect, and frequent carbonate nodules and evidences of pedogenic processes (Folguera and Zárate, 2009). Visconti et al. (2010) interpreted them as eolian de- posits characterized by loessic materials, with a high per- centage of lithic fragments and volcaniclastic sediments. Detailed geological and stratigraphic descriptions of the Cerro Azul Formation are provided by Linares et al. (1980), Goin et al. (2000), Visconti et al. (2010), and Folguera and Zárate (2009).

•In particular, remains from Laguna Chillhué and Quehué (Pascual and Bondesio, 1982; Montalvo et al., 1995; Sostillo, 2016) were recovered from the lower levels of the Cerro Azul Formation and interpreted as fluvial fa- cies (Deschamps et al., 2013; Sostillo et al., 2014).

• formation-level stratigraphic resolution

Environment/lithology: fluvial; lithified, brown siltstone and sandstone

Size class: macrofossils

Collection methods: Esteban, et al. 2000: Todos los ejemplares analizados están depositados en

•la Cátedra de Geología Histórica de la Facultad de Ciencias Exactas y Naturales de la Universidad Nacional ele La Pampa, Argentina, cuyo acrónimo es GHUNLPam

Primary reference: F. J. Goin, C. I. Montalvo, and G. Visconti. 2000. Los marsupiales (Mammalia) del Mioceno Superior de la Formacion Cerro Azul(Provincia de La Pampa, Argentina). Estudios Geol 56:101-126 [C. Jaramillo/J. Carrillo/J. Carrillo]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 151498: authorized by Carlos Jaramillo, entered by Juan Carrillo on 04.10.2013, edited by Grace Varnham, Miranta Kouvari, Philip Mannion and Kateryn Pino

Creative Commons license: CC BY (attribution)