Results 51 to 60 of about 52,738 (228)

The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana [PDF]

open access: yes, 2016
The eoorthid brachiopod Apheoorthina is reported for the first time from the Lower Ordovician of NW Argentina. It is represented by a species similar to A.
Benedetto, Juan Luis Arnaldo   +1 more
core   +2 more sources

Las plantas vasculares de los afloramientos rocosos de Suesca, Cordillera Oriental Colombiana

open access: yesActualidades Biológicas, 2017
Se muestrearon las plantas vasculares presentes en tres tipos de afloramientos rocosos del municipio de Suesca, departamento de Cundinamarca (Colombia), ubicados entre 2.800 y 3.000 m de altitud. Estos afloramientos se denominan Valle de Los Halcones (VH), Farallones de Suesca (FS) y Los Monolitos (LM) y son los sitios predilectos para la escalada ...
Avellaneda-Cadena, Carolina   +1 more
openaire   +3 more sources

Bending the Sierra Madre Oriental: A Paleocene Orocline

open access: yesTectonics, Volume 44, Issue 11, November 2025.
Abstract The Sierra Madre Oriental belt of the Mexican thin‐skinned fold‐and‐thrust belt, which formed during the Late Cretaceous due to the subduction of the Farallon Plate beneath North America, exhibits a pronounced curvature of approximately 100°, concave to the southwest.
Rafael Guerra Roel   +5 more
wiley   +1 more source

New species of Eleutherodactylus of Colombia (Amphibia: Leptodactylidae). I: five new species from the paramos of the Cordillera Central New species of Eleutherodactylus of Colombia (Amphibia: Leptodactylidae). I: five new species from the paramos of the Cordillera Central

open access: yesCaldasia, 1980
Se describen aquí las nuevas especies Eleutherodactylus obmutescens, E. racemus y E. simoterus, del grupo unistrigatus, provenientes de los Páramos de Puracé, Las Hermosas y Letras, respectivamente, en la Cordillera Centralde Colombia. Estas especies son
Lynch John D.
doaj  

La napa de Calazaya : una prueba de acortamientos importantes controlados por elementos paleoestructurales en los Andes bolivianos [PDF]

open access: yes, 1991
Una napa tectonica de desplazamiento importante se evidencia en el limite Altiplano-Cordillera Oriental de Bolivia (20° S). Su emplazamiento proviene del transporte hacia el Este de un amplio dominio aloctono en el Oligoceno Superior-Mioceno Inferior. El
Baby, Patrice   +3 more
core  

Los Hammatoceratinae (ammonitina) del Toarciense y Aaleniense en la Cordillera lbérica y Cordillera Cantábrica oriental. Implicaciones paleobiogeográficas.

open access: yesSpanish Journal of Palaeontology, 2022
Los Hammatoceratinae constituyen una de !as subfamilias de ammonoideos que estan presentes en los materiales del Lias y del Dagger del Norte de España, con un registro escaso en relación al resto de los ammonoideos. Se han distinguido 43 espe­cies y 7 generos que se distribuyen desde la Zona Variabilis (Subzona Illustris) del Toarciense hasta la Zona ...
openaire   +2 more sources

Scale‐Dependent Effects of Landscape Heterogeneity on Butterfly Functional and Taxonomic Diversity in Andean Urban Parks

open access: yesEcology and Evolution, Volume 15, Issue 10, October 2025.
Local vegetation structure and landscape composition significantly affect butterfly diversity, underscoring the role of habitat quality in shaping butterfly assemblages ABSTRACT Urbanization poses a significant threat to biodiversity, reducing native species diversity in cities.
Nathali Coral‐Acosta   +3 more
wiley   +1 more source

Conodonts from the Cambrian-Ordovician Boundary in the Cordillera Oriental, NW Argentina

open access: yesStratigraphy, 2016
The Cambrian-Ordovician boundary in NW Argentinawas originally proposed for the lower upper section of the Cardonal Formation in the Amarilla Creek, Cajas Range, Cordillera Oriental of Jujuy, based on the first appearance of the conodont Cordylodus lindstromi.
Albanesi, Guillermo Luis   +4 more
openaire   +2 more sources

Studies in Colombian Asteraceae: first report of the genus Tragopogon L.

open access: yesBiota Colombiana, 2016
As result of recent explorations in the Andean Cordillera Oriental of Colombia, Tragopogon porrifolius L. (Asteraceae: Cichorieae) is reported for the first time for this country.
Diego Giraldo-Cañas   +2 more
doaj   +1 more source

Fluvial dynamics on inverted rifts from the χ parameter: application to the Eastern Cordillera of Colombia and other reference mountain belts [PDF]

open access: yes, 2016
The aim of this study lies in the extraction of the dynamic state of the drainage network in mountain belts that derive from rift inversion, such as the Eastern Cordillera of Colombia.
Struth, Lucía, Teixell, Antonio
core  

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