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: Early/Lower Eocene (55.8 - 48.6 Ma)
• middle Chubut River volcanic-pyroclastic complex.
•According to Carvalho et al. 2013:
•40Ar/39Ar analyses of single sanidine crystals from a volcanic ash bed located within the densely sampled portion of the section yielded an early Eocene age of 52.2 +- 0.22 Ma, further supported by the detection of two paleomagnetic reversals, and two other, low resolution Ar/Ar ages from the same section for the most recent synopsis, see Wilf et al., 2003, 2005; Wilf, 2012). From the combined evidence, 52.2 Ma is the best available working age for the entire flora.
Environment/lithology: crater lake; lithified tuff
Size class: macrofossils
Preservation: adpression
Collection methods: Studied material comes from collections at the Museo Paleontológico Egidio Feruglio, Chubut, Argentina (MPEF-Pb); National Museum of Natural History, Smithsonian Institution, USA (USNM); Museo de Ciencias Naturales de La Plata, Buenos Aires, Argentina (LPPb); Fundación Miguel Lillo, Tucumán, Argentina (LilPb), and Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina (FCENCBPB).
Primary reference: C. C. Gonzalez, M. A. Gandolfo, M. C. Zamaloa, N. R. Cúneo, P. Wilf and K. R. Johnson. 2007. Revision of the Proteaceae macrofossil record from Patagonia, Argentina. The Botanical Review 73(3):235-266 [C. Jaramillo/P. Santamarina]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 153415: authorized by Carlos Jaramillo, entered by Patricio Santamarina on 16.12.2013, edited by Carlos Jaramillo
Creative Commons license: CC BY (attribution)
Taxonomic list
Equisetopsida | |
Agathis zamunerae4 Wilf et al. 2014 | |
Embothrium | |
? Embothrium pregrandiflorum Berry 1938 Chilean firebush | |
Dicotyledoneae | |
Eucalyptus spp.2 L'Héritier de Brutelle 1789 eucalyptus Localities: LH4, LH6, LH13, LH15, LH25, LHF, LH27
| |
Angiospermae | |
Orites bivascularis Romero et al. 1988
Lomatia preferruginea Berry 1938
Lomatia occidentalis Frenguelli 1943 | |
Atherospermophyllum guinazui3 Knight and Wilf 2013 comb. nov., localities LH6, LH13, LH23, LH25, (Wilf, 2003); LH27 (Gandolfo, 2011)
| |
Monimiophyllum callidentatum n. sp.3
Monimiophyllum callidentatum n. sp.3 Knight and Wilf 2013 Morphotype TY027, unknown dicot sp. Wilf et al. 2005
| |
Polypodiopsida | |
Todea amissa n. sp.1
Todea amissa n. sp.1 Carvalho et al. 2013 | |
Roupala | |
Roupala patagonica Durango de Cabrera and Romero 1988 |