Results 31 to 40 of about 31,552 (277)
Early angiosperm fossil leaves in Chubut Group, Cretaceous, Argentina [PDF]
The Paleontological Society Special Publications, 1992 The oldest angiosperm leaves from Patagonia were reported from Baquero Formation (Barremian-Aptian) in a mesofitic flora of more than one hundred gymnosperm and fern species. The next younger records are from the Chubut Group, a thick assemblage of pyroclastic sediments, with sand and conglomerate facies and frequent paleosols.
Edgardo J. Romero, Ricardo Palma
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d13C tracing of dissolved inorganic carbon sources in Patagonian rivers (Argentina) [PDF]
, 2005 The main Patagonian rivers (Colorado, Negro, Chubut, Deseado, Coyle, Chico, Santa Cruz and Gallegos) were sampled between September 1995 and November 1998 to determine their chemical and isotopic compositions, the origins of the suspended and dissolved ...
Brunet, Frédéric +5 more
core +4 more sources
Extraterrestrial microspherules from Bajada del Diablo, Chubut, Argentina
Geoscience Frontiers, 2017 AbstractThe Quaternary infilling of a circular structure located in Bajada del Diablo, Chubut Province, Argentina has been proposed as a crater strewn field in previous studies. Here we report the finding of about 65 microspherules collected in a trench excavated in the center of the structure. The majority of hand-picked specimens are single, but some
Orgeira, M.J. +11 more
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Development of a site fidelity index based on population capture-recapture data [PDF]
PeerJ, 2018 Background Site fidelity is considered as an animal’s tendency to return to a previously occupied place; this is a component of animal behaviour that allows us to understand movement patterns and aspects related to the animal’s life history.
Ayelen Tschopp +3 more
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Mesozoic Coleopteran Faunas fromArgentina: Geological Context, Diversity, Taphonomic Observations, and Comparison with Other Fossil Insect Records [PDF]
, 2012 The order Coleoptera is the most diversified group of the Class Insecta and is the largest group of the Animal Kingdom. This contribution reviews the Mesozoic insects and especially the coleopteran records from Argentina, based on bibliographical and ...
Gallego, Oscar Florencio +2 more
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Ecología Austral, 2016 Seedling recruitment is a critical stage of a plant’s cycle which determines population viability, the potential for invasiveness of a plant species and the success of establishment of a crop, among other processes.
Luciana González Paleo +4 more
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Limnological aspects of humic substances in Chubut River (Patagonia‐Argentina)
River Research and Applications, 2011 AbstractHumic Substances (HSs) of the Chubut River (Patagonia‐Argentina) have been investigated, during two consecutive years and different climatic seasons, in order to obtain a first approach at their spatial and temporal distribution, as well as their origin and relation with environmental characteristics.
Scapini, M. del C. +5 more
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Aquatic Biology, 2013 The present study analyzes the species composition of elasmobranch by-catch of bottom trawlers that targeted common hake Merluccius hubbsi on the northern and central Patagonian shelf during 2001, 2002 and 2003. Six surveys were conducted, and a total of
AC Crespi-Abril +3 more
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Histological evidence for a supraspinous ligament in sauropod dinosaurs [PDF]
, 2015 Supraspinous ossified rods have been reported in the sacra of some derived sauropod dinosaurs. Although different hypotheses have been proposed to explain the origin ofthis structure, histological evidence has never been provided to support or reject any
Abdalla O +37 more
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Semiárida, 2020 Con el objetivo de evaluar el impacto en la vegetación y el suelo de una obra de redistribución de agua en área de estepa, se desarrolló durante 2010 y 2011 un ensayo en el área ecológica de Sierras y Mesetas Occidentales del NO de Chubut.
G. Ciari, W. Opazo
doaj