Results 41 to 50 of about 8,526 (161)

Unusual occurrence of Cochlichnus in aeolian sandstones: evidence for a stiletto fly larval origin

open access: yesPapers in Palaeontology, Volume 12, Issue 3, May/June 2026.
Abstract Cochlichnus anguineus is an ichnotaxon recognized for its distinctive regular wavy morphology. It is a characteristic trace fossil typically associated with aquatic and marginal aquatic environments. However, in this study we examine its unusual occurrence in the aeolian sandstones of the Botucatu Formation (Lower Cretaceous, Paraná Basin ...
Bernardo de C. P. e M. Peixoto   +8 more
wiley   +1 more source

Bioerosion Drill Holes Increase Carbonate Dissolution in the Planktonic Foraminifer Globigerinoides ruber

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Planktonic foraminifera are instrumental in reconstructing paleoceanographic and paleoclimatic conditions. However, preferential dissolution can significantly bias both assemblages and chemical analyses, leading to biased interpretations. Bioerosional drill holes are commonly found in foraminiferal tests; however, it remains unknown if these ...
Cristiane Fraga Frozza   +5 more
wiley   +1 more source

Marsh development and sea level changes in the Gernika Estuary (southern Bay of Biscay): foraminifers as tidal indicators

open access: yesScientia Marina, 2006
The ecological distribution of some species of Foraminifera living in estuaries can be used in the interpretation of former coastal lines. There is a close relationship between tide level and the distribution of particular benthic foraminifer species.
Ana Pascual, Julio Rodriguez-Lazaro
doaj   +1 more source

Las unidades litoestratigráficas del Pérmico y Triásico inferior y medio en el sector SE de la Cordillera Ibérica

open access: yesEstudios Geologicos, 1992
Se definen formalmente las unidades litoestratigráficas que constituyen el Pérmico y Triásico del SE de la Cordillera Ibérica representados en Facies Muschelkalk, Buntsandstein y Saxoniense. El rango definido para las unidades es de Formación, algunas de
J. López Gómez, A. Arche Miralles
doaj   +1 more source

El Jurásico Terminal y el Cretácico Inferior en las Sierras de Cazorla y del Segura (Zona Prebética) [PDF]

open access: yes, 1978
Universidad de Granada, Departamento de Estratigrafía.
García Hernández, Manuel
core  

Biome Specialisation in Squirrels: Phylogenetic and Geographic Patterns

open access: yesJournal of Biogeography, Volume 53, Issue 1, January 2026.
ABSTRACT Aim Habitat breadth shapes species' responses to environmental change and influences large‐scale biodiversity patterns. According to Vrba's resource‐use hypothesis, biome specialists (inhabiting a single biome) exhibit higher speciation rates than generalists due to increased population isolation during habitat fragmentation, generally ...
Iris Menéndez   +9 more
wiley   +1 more source

Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America

open access: yesGeologica Acta, 2017
Typology and internal texture analyses were performed on detrital zircons obtained from the Miocene sandstones of the Ladrilleros-Juanchaco sedimentary sequence (Colombia, Equatorial Pacific).
E. OSORIO-GRANADA   +5 more
doaj  

Descripcion de Eoglobigerina Ferreri, un nuevo foraminifero planctonico del Paleoceno

open access: yesEstudios Geologicos, 1991
Se describe una nueva especie de foraminífero planctónico del Paleoceno medio, encontrada en diferentes lugares de la Cuenca Vasco-Cantábrica, aunque su distribución geográfica en aquel tiempo fue mucho más amplia, como lo atestigua el hecho de que ...
X. Orue-etxebarría, E. Apellániz
doaj   +1 more source

“Like We're Meeting the Ancestors”: Toward an Lˈnucentric Archaeology in Miˈkmaˈki

open access: yesAmerican Anthropologist, Volume 127, Issue 4, Page 720-733, December 2025.
ABSTRACT We explore the possibilities for an archaeology that is relevant to, and empowering of, Indigenous futures by reflecting on four seasons of archaeological fieldwork, our encounters with Lˈnu (or Miˈkmaw) material culture, our experiences returning to ancestral Lˈnu places, and our engagements with sociocultural and archaeological ...
Michelle Lelièvre   +4 more
wiley   +1 more source

Home - About - Disclaimer - Privacy