Results 31 to 40 of about 779 (131)

Development of Holocene lacustrine microbialites on the Iberian Peninsula: Insights into environmental and depositional controls using X‐ray CT and petrography

open access: yesSedimentology, Volume 73, Issue 4, Page 1148-1184, June 2026.
ABSTRACT Microbial mats and microbialites are common in modern and ancient saline lacustrine environments and are highly responsive to biological and environmental factors. As such, they represent important sources of high‐resolution environmental data across a wide range of geological time. Nonetheless, interpretation of fossil mats is non‐trivial due
Connor Doyle   +6 more
wiley   +1 more source

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

A Test of the MSEC Method for Paleoclimate and intersite correlations from Late Pleistocene/Holocene cave sites in southern Europe : results from Cova de les Cendres, SE Spain

open access: yesEspacio, Tiempo y Forma. Serie I, Prehistoria y Arqueología, 2000
En los ultlmos diez alios, se han utilizado las mediciones de la susceptibilidad magnetica (MS) de los sedimentos de los yacimientos arqueologicos en cueva para establecer correlaciones entre yacimientos y una estimacion del paleoclima.
Brooks Ellwood   +5 more
doaj   +1 more source

A Formação Serra Alta, Permiano, no centro-leste do Estado de São Paulo, Bacia do Paraná, Brasil

open access: yesBrazilian Journal of Geology
A individualização e o mapeamento da Formação Serra Alta no Estado de São Paulo sempre foi motivo de controvérsia na comunidade geológica. Apesar de apresentar extensão comparável à Formação Irati em subsuperfície, a unidade ainda carece de estudos mais ...
Lucas Veríssimo Warren   +4 more
doaj   +1 more source

Nuevos datos sobre la estratigrafía y evolución sedimentaria del mesozoico de la Unidad de Sierra Harana (subbético interno, Cordillera Bética)

open access: yesEstudios Geologicos, 1986
En este artículo se relacionan todos los términos de la serie Mesozoica en el espacio y en el tiempo y se propone un modelo sobre su evolución sedimentaria, en el que se destacan algunos aspectos significativos del dominio paleogeográfico (Subbético ...
D. Pérez López
doaj   +1 more source

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

“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

El límite entre la zona de Ossa-Morena y la zona Sur-Portuguesa. Evidencias y propuestas sobre su posición y significado (macizo Hercinico Ibérico)

open access: yesEstudios Geologicos, 1988
El carácter del límite entre la Zona de Ossa-Morena (ZOM) y la Zona Sur-Portuguesa (ZSP) aparece como un tema controvertido en la bibliografia geológica de los últimos años sobre el SW del Maciro Hercínico Ibérico.
B. Abalos
doaj   +1 more source

The division of food space among mammalian species on biomes

open access: yesEcography, Volume 2025, Issue 10, October 2025.
Understanding how species' ecological partitioning functions across biomes is fundamental to macroecology and conservation biology. Here, we examine the global distribution of dietary strategies in terrestrial mammals, focusing on how biome specialization modulates trophic diversity and structure at a broad geographical scale.
Sara Gamboa   +4 more
wiley   +1 more source

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