Results 111 to 120 of about 32,393 (253)

Possible Sediment Mixing and the Disparity between Field Measurements and Paleolimnological Inferences in Shallow Iowa Lakes in the Midwestern United States

open access: yesGeosciences, 2018
Field measurements of water quality in Iowa lakes contradict paleolimnological studies that used 210Pb dating techniques in 33 lakes to infer accelerating eutrophication and sediment accumulation in recent decades.
Roger W. Bachmann   +2 more
doaj   +1 more source

Influence of bioturbation on denitrification activity in Mediterranean coastal sediments:an in situ experimental approach [PDF]

open access: yes, 1998
An in situ experiment was conducted in the French Mediterranean littoral (Gulf of Fos) from July 1993 to January 1994 using controls without macrofauna or natural sediments.
Bonin, Patricia   +2 more
core   +1 more source

bioturbation

open access: yes
Citation: 'bioturbation' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14504 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Supercritical‐flow structures in a Cretaceous submarine channel–lobe transition zone, Point Loma Formation, California

open access: yesThe Depositional Record, Volume 12, Issue 3, June 2026.
We document meter‐scale antidune and cyclic‐step deposits in channel–lobe transition zone (CLTZ) deposits of the Upper Cretaceous Point Loma Formation in San Diego, California. These results provide new insights into sediment transport dynamics in CLTZ environments, which are critical for understanding reservoir connectivity and heterogeneity in ...
Luthfi Saifudin   +4 more
wiley   +1 more source

Aridity Structures the Microbial Potential for Carbon Cycling and Mediates the Impact of Mammal Bioturbation at the Continental Scale

open access: yesJournal of Sustainable Agriculture and Environment
Introduction In Australia, the historical loss of native digging mammals has profoundly changed ecosystems and their functioning. However, little is known about how the decline in digging mammal presence alters microbes and their functional potential and
Eleonora Egidi   +4 more
doaj   +1 more source

Limestone Diagenetic Records Based on Petrographic Data of Sentolo Formation at Hargorejo Traverse, Kokap, Kulonprogo

open access: yesIndonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v7i2.138Limestone diagenetic records of Sentolo Formation have been studied in order to trace the history of the geological processes after the deposition of the rocks.
Sigit Maryanto
doaj   +1 more source

How bioturbators perturb the paleo record.

open access: yes, 2022
Animal life on the sea floor has a tremendous influence on the chemical, physical and environmental properties of the surface layer of marine sediment. Most prominent is a process called bioturbation, which comprises the physical mixing of the topmost sediment layer. Without animal activity, the sediment is made up by sequential layers due to perpetual
openaire   +3 more sources

Loess Studies in Aotearoa New Zealand

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Loess in Aotearoa New Zealand (ANZ) has been studied since its first documented recognition (on Banks Peninsula) in 1878 by Julius von Haast. A decade later, John Hardcastle revealed that southern ANZ loess was both glacial in origin and contained signals of past climates.
Brent V. Alloway   +4 more
wiley   +1 more source

An Overview of Tsunami Hazards in the Southwest Pacific Ocean

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
The southwest Pacific region is geologically complex and exhibits all the principal causes of tsunami generation. While contemporary events and historical catalogs indicate that trans‐Pacific tsunamis have affected this area (∼18% of tsunamis reported globally), it is unique in that a large part of the tsunami effects over the ∼200‐year historical ...
Jean H. M. Roger   +13 more
wiley   +1 more source

Geochemical and ecological aspects of lower Frasnian pyrite-ammonoid level at Kostomłoty (Holy Cross Mountains, Poland) [PDF]

open access: yes, 2004
The lower Frasnian (transitans Zone with Ancyrodella priamosica = MN 4 Zone) rhythmic basin succession of marly limestones and shales (upper Szydlówek Beds) at Kostomloty, western Holy CrossMts., Central Poland, contains a record of the transgressive ...
Bond, D.P.G.   +3 more
core  

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