Laguna del Hunco: quarry LH27 (Eocene of Argentina)

Also known as LH27

Where: Chubut, Argentina (42.5° S, 70.0° W: paleocoordinates 45.0° S, 60.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Huitrera Formation, Ypresian (56.0 - 47.8 Ma)

• See P. Wilf et al. 2003, Science suppl., for detailed lithostratigraphy, paleomagnetic stratigraphy, and first Ar-Ar ages. See P. Wilf et al. 2012 (American Journal of Botany) for the revised Ar-Ar age given above.

Environment/lithology: crater lake; lithified, fine-grained, tuffaceous, gray, silty, sandy siliciclastic sediments

• Large caldera-lake, embedded in the Eocene middle Chubut River volcanic pyroclastic complex. See E. Aragon and M.M. Mazzon, Rev. Asoc. Geol. Argent. 52(3):243-256 (1997).
• See Wilf et al. 2003, Science suppl., for complete lithologic summary.

Size classes: macrofossils, mesofossils, microfossils

Preservation: adpression, original silica, original carbon, replaced with silica

Collected by P. Wilf, N.R. Cuneo, K.R. Johnson, P. Puerta, M. A. Gandolfo in 2009, 2016; reposited in the MEF

Collection methods: bulk, quarrying, mechanical,

Primary reference: M. A. Gandolfo, E. J. Hermsen, M. C. Zamaloa, K. C. Nixon, C. C. González, P. Wilf, N. R. Cúneo and K. R. Johnsosn. 2011. Oldest Known Eucalyptus Macrofossils Are from South America. Plos One 6(6):e21084 [C. Jaramillo/C. Jaramillo/C. Jaramillo]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 197634: authorized by Peter Wilf, entered by Elena Stiles on 19.11.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Angiospermae
 Fagales - Fagaceae
Castaneophyllum patagonicum2
Castaneophyllum patagonicum2 Wilf et al. 2019
 Coniferales - Podocarpaceae
Huncocladus laubenfelsii1
Huncocladus laubenfelsii1 Andruchow-Colombo et al. 2019 podocarp
1Andruchow-Colombo et al. 2019; 2Wilf et al. 2019