Results 101 to 110 of about 7,350 (205)

Chamber‐by‐Chamber Measurements of Planktonic Foraminiferal Mg, Sr, and Na to Ca Ratios With Femtosecond LA‐ICP‐MS

Rapid Communications in Mass Spectrometry, Volume 40, Issue 7, 15 April 2026.
ABSTRACT Rationale Distribution patterns of foraminifera are controlled by environmental parameters such as temperature, salinity, and nutrient concentrations in each water mass. Since trace elements to Ca ratios of marine microfossil calcite test of foraminifera record environmental and ecological habitat information, we used femtosecond (fs) LA‐ICP ...
Toshihiro Yoshimura, Qing Chang, Naohiko Ohkouchi, Yoshiyuki Ishitani, Dana Ulanova, Hirotoshi Endo, Junichiro Kuroda, Yurika Ujiié   +7 more
wiley   +1 more source

Petrología sedimentaria. Notas de teoría. 3. Procesos en ambientes exógenos I: Meteorización [PDF]

, 2010
En este tercer bloque analizaremos algunos de los procesos que dan lugar a la formación de las rocas sedimentarias. En este bloque estudiaremos la meteorización.
Alonso-Zarza, Ana María
core   +1 more source

Cyclone‐induced mixing and stratification shape autumnal hypoxia in a temperate estuary

Limnology and Oceanography Letters, Volume 11, Issue 2, March 2026.
Abstract Autumnal hypoxia in temperate estuaries is often overlooked due to its smaller extent, weaker intensity, and sparse observations compared to summer. However, climate variability may alter its seasonality. Using 40 yr (1984–2023) of hypoxic volume data from the Chesapeake Bay, combined with numerical simulations, we examined interannual drivers
Chunqi Shen, Jeremy M. Testa
wiley   +1 more source

Petrología de Minas de Santa Quiteria (Toledo) [PDF]

, 1985
Las rocas subvolcánicas aparecen como «sills» intrusivos concordantes con la estratificación. Se han identificado en el ángulo SE de la Hoja, al sur de la Sierra del Aljibe, siguiendo el Arroyo Corazoncillo.
Ruíz García, Casilda
core   +1 more source

Lower Glacial Oxygen in the Eastern Equatorial Pacific Concentrated in the Deep Sea

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Oxygen in the global oceans has declined since the 1960s, including in the Eastern Equatorial Pacific (EEP). Reconstructions of EEP glacial oxygenation help advance understanding of current and projected ocean deoxygenation. Previous estimates of the glacial oxygen deficient zones (ODZs) in the upper EEP are poorly constrained. Here we include
Wanyi Lu, Delia W. Oppo, Xiaoying Jiang, Haowen Dang, Zhimin Jian   +4 more
wiley   +1 more source

Estudio bioestratigráfico (Ammonoidea) del Aaleniense y Bajociense en Asturias [PDF]

, 1979
Se ha reconocido un conjunto de parámetros tafonómicos que están íntimamente relacionados con las condiciones de depósito y con los procesos de diagénesis temprana.
Fernández López, Sixto Rafael, Súarez Vega, Luis Carlos   +1 more
core   +2 more sources

Temperature Controls on Carbon‐Sulfur Diagenesis in Deep Hydrothermal Subseafloor Sediments

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Carbon mobilization and sulfur transformation play a significant role in deep carbon and sulfur cycling. However, sulfur biogeochemistry and its coupling with carbon and iron cycling remain poorly constrained in hydrothermal sediments. We investigated the effect of temperature on carbon‐sulfur‐iron diagenesis in subsurface sediments (≤370 m ...
Bing‐Zheng Wu, Jiarui Liu, Guang‐Chao Zhuang, Xiting Liu, Zhen Zhou, Andreas P. Teske, Samantha B. Joye   +6 more
wiley   +1 more source

Bone Diagenesis and Extremes of Preservation in Forensic Science

Humans
Understanding the composition and diagenetic processes of the deposition environment is pivotal to understanding why bone undergoes preservation or diagenesis.
Rhys Williams, Tim Thompson, Caroline Orr, Gillian Taylor   +3 more
doaj   +1 more source

Estratigrafía biomolecular :la racemización-epimerización de aminoácidos como herramienta geocronológica y paleotermométrica [PDF]

, 1999
El estudio de aminoácidos como biomarcadores en sedimentos, se ha convertido en una metodología y herramienta necesaria en el análisis de condiciones paleoambientales y por lo tanto de la evolución climática en el pasado.
Canoira López, Laureano, García-Alonso, P., Llamas, F.J., Ortiz Menéndez, José Eugenio, Torres Pérez-Hidalgo, Trinidad José   +4 more
core   +1 more source

Cooling climate across last interglacial high stands on San Salvador and Great Inagua, The Bahamas

The Depositional Record, Volume 12, Issue 1, February 2026.
Temperature data comparison with last interglacial mollusc clumped isotope data from this study, as well as from Bermuda (Minnebo et al., 2024; Zhang et al., 2021). The ‘later’ and ‘earlier’ ages within MIS 5e refer to Reef II and Reef I, respectively, for Bahamas data.
Ian Winkelstern, Sierra Petersen, H. Allen Curran, Cecilie Phillips, Alex Quizon, Bosiljka Glumac, David Griffing   +6 more
wiley   +1 more source