Where: Chubut, Argentina (43.0° S, 67.6° W: paleocoordinates 45.3° S, 56.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Middle Member (La Colonia Formation), Maastrichtian (72.1 - 66.0 Ma)

• "Middle levels of the La Colonia Formation (Page et al. 1999)" (O'Gorman et al. 2013)

•

•La Colonia Fm = Maastrichtian (Clyde et al. 2021)

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; lithology not reported

Size classes: macrofossils, mesofossils, microfossils

Reposited in the MEF

Collection methods: chemical,

• In De Benedetti et al. (2023) sections located at the El Buitre Hill and the Mirasol Chico Creek area: 1- Quebrada del Helecho/Cañadón del Irupé (QH/CI), 2- Cerro Bosta (CBO), 3- Cerro Buitre Norte (CBN = Plesiosaurio locality ‘LCP’ of De Benedetti et al., 2021), and 4- Chiva Muerta (CHM). Of the 157 processed samples, 83 were palynologically fertile. About 250 palynomorphs (including megaspores) were identified; among them, 20 belong to gymnosperms, and 67 to angiosperms.

•The samples were processed following standard palynological techniques (Traverse, 2007).

Primary reference: N. R. Cúneo, E. J. Hermsen, and M. A. Gandolfo. 2013. Regnellidium (Salviniales, Marsileaceae) macrofossils and associated spores from the Late Cretaceous of South America. PloSOne 174(3):340-349 [P. Wilf/E. Stiles/E. Stiles]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 199410: authorized by Peter Wilf, entered by Elena Stiles on 23.01.2019, edited by Evangelos Vlachos

Creative Commons license: CC BY (attribution)