Results 91 to 100 of about 64,238 (294)

Microbial mats and thalassinid shrimp: Spatial and geochemical interactions in a modern intertidal environment

Sedimentology, EarlyView.
ABSTRACT This research examines the spatial and geochemical interactions between mat‐forming microorganisms and thalassinid shrimp in an intertidal flat situated on the shores of Willapa Bay, Washington, USA. The study serves as a contemporary analog for the relationships between mats and burrowing organisms in deep time.
Brette S. Harris, Sara K. Biddle, Maya T. LaGrange, Scott Melnyk, Cody N. Lazowski, Jenifer S. Spence, Daniel Alessi, Jeffrey Kavanaugh, Kurt O. Konhauser, Murray K. Gingras   +9 more
wiley   +1 more source

Petrographic- mineralogical examination and diagenetic history of the Paleogene evaporites in Bulanık (Muş), Turkey

Bulletin of the Mineral Research and Exploration, 2020
Oligocene aged evaporite formations are observed in shallow sea-sabkha environments that develop in highly restricted conditions from sea in northeastern of the Muş basin.
Pelin Güngör Yeşi̇lova
doaj   +1 more source

Early Diagenesis of Lower Pliensbachian Sediments from the Algarve Basin (Portugal): Characterisation and Relation with Tectonic Evolution [PDF]

, 2010
The Lower Jurassic (Lower Pliensbachian) sedimentary record of the western end of the Algarve Basin (Portugal) is made of decimetric thick layers of limestone and dolomitized limestone with chert nodules and inter-layered chert beds.
Azevedo, Maria do Rosário, Ouajhain, Brahim, Ribeiro, Carlos, Terrinha, Pedro   +3 more
core  

Palaeoenvironmental and diagenetic reconstruction of a closed-lacustrine carbonate system - the challenging marginal setting of the Miocene Ries Crater Lake (Germany) [PDF]

, 2017
Chemostratigraphic studies on lacustrine sedimentary sequences provide essential insights on past cyclic climatic events, on their repetition and prediction through time.
Abdul Aziz, Allan, Allan, Alonso-Zarza, Anadon, Anadón, Anderson, Andrews, Arp, Arp, Arp, Arp, Barnaby, Beier, Benito, Bennett, Brand, Buchner, Buchner, Budd, Böhme, Böhme, Börner, Chamberlain, Christ, Christ, Danielopol, Decrouy, Depeche, Dickson, Dravis, Dwyer, Einsele, Emrich, Flügel, Gentner, Gierlowski-Kordesch, Godet, Goldstein, Gouramanis, Grafenstein, Gray, Halley, Hays, Heaton, Holmes, Immenhauser, Immenhauser, Jankowski, Janz, Janz, Joachimski, Junge, Keatings, Kontrovitz, Kooij, Kwiecien, Leng, Leng, Li, Li, Lohmann, Lohmann, Mangili, Mangili, Marshall, Marshall, Mayr, Mazzini, Melezhik, Mischke, Mutti, Niemann, Oehlerich, Orszag-Sperber, Pache, Pohl, Prieto, Richter, Richter, Riding, Romanek, Rothe, Sanz, Schwarz, Sheppard, Stansell, Staudacher, Stevens, Swart, Talbot, Tütken, Vasconcelos, Wilson, Wittkop, Xia   +95 more
core   +1 more source

Microbially generated ferruginous crusts: A potential biosignature of continental input in coastal settings

Sedimentology, EarlyView.
ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder, Renata Guimarães Netto, Alisson Klayton Martins   +2 more
wiley   +1 more source

Indicators of hot fluid migration in sedimentary basins: evidence from the UK Atlantic Margin [PDF]

, 2003
Microthermometric, petrographic and isotopic methods have been used to detect evidence for hot fluid flow in Mesozoic and Tertiary sediments from the NW UK continental margin, West of Shetland. New data presented here show that temperatures are hotter by
Boyce, A.J., Chen, H., Parnell, J., Watt, G.R., Wycherley, H.L.   +4 more
core   +1 more source

Sedimentary biogeochemical provinces in the northern limit of the oxygen minimum zone from the northeastern Mexican Pacific

Sedimentology, EarlyView.
ABSTRACT Continental margins are reservoirs of materials of terrestrial and marine origin, and they play a crucial role in understanding the spatial and temporal variability of biogeochemical cycles. This, in turn, provides insights into the development and intensity of oxygen minimum zones (OMZs).
Alberto Sánchez
wiley   +1 more source

Chemical weathering and provenance evolution of Holocene–Recent sediments from the Western Indus Shelf, Northern Arabian Sea inferred from physical and mineralogical properties [PDF]

, 2012
We present a multi-proxy mineral record based on X-ray diffraction and diffuse reflectance spectrophotometry analysis for two cores from the western Indus Shelf in order to reconstruct changing weathering intensities, sediment transport, and provenance ...
Clift, Peter D., Hillier, Stephen, Köhler, Cornelia M., Limmer, David R., Moreton, Steven G., Tabrez, Ali R.   +5 more
core   +2 more sources

Spherulite in the modern aragonitic travertine stromatolite has a calcite core with exopolymers

Sedimentology, EarlyView.
ABSTRACT Spherulites are spherical to ellipsoidal particles formed by various crystalline substances and can be abiotically synthesised in the laboratory. Among various spherulite types, spherulites composed of calcium carbonate are also found in various natural environments, but their abiotic or biotic origins are still controversial.
Fumito Shiraishi, Takayuki Akimoto, Naotaka Tomioka, Satoko Motai, Yoshio Takahashi   +4 more
wiley   +1 more source

Sources and mechanisms for the enrichment of highly reactive iron in euxinic Black Sea sediments [PDF]

, 2004
The deep basinal euxinic sediments of the Black Sea are enriched in iron that is highly susceptible to sulfidization compared to oxic/suboxic continental margin sediments in the Black Sea and oxic/dysoxic continental margin and deep-sea sediments ...
Anderson, T.F., Raiswell, R.
core