Results 101 to 110 of about 64,238 (294)

Differences in the chemical composition of organic-walled dinoflagellate resting cysts from phototrophic and heterotrophic dinoflagellates [PDF]

, 2013
Dinoflagellates constitute a large proportion of the planktonic biomass from marine to freshwater environments. Some species produce a preservable organic-walled resting cyst (dinocyst) during the sexual phase of their life cycle that is an important ...
Bogus, Kara, Harding, Ian C, Lauwaert, Johan, Mertens, Kenneth, Versteegh, Gerard JM, Vrielinck, Henk, Zonneveld, Karin AF   +6 more
core   +1 more source

Disentangling palaeoecological and outcrop controls on MISS occurrence in c. 1 Ga fluvio‐lacustrine facies of the Diabaig Formation, Scotland

Sedimentology, EarlyView.
ABSTRACT The c. 1 Ga Diabaig Formation of north‐west Scotland preserves diverse lacustrine and fluvial facies and abundant microbial and non‐microbial surficial sedimentary features. 172.6 m of section was logged across seven localities to assess the distribution of microbially induced sedimentary structures (MISS) relative to lithofacies, substrate ...
Seán T. Herron, Neil S. Davies, William J. McMahon   +2 more
wiley   +1 more source

In situ detection of boron by ChemCam on Mars [PDF]

, 2017
We report the first in situ detection of boron on Mars. Boron has been detected in Gale crater at levels Curiosity rover ChemCam instrument in calcium-sulfate-filled fractures, which formed in a late-stage groundwater circulating mainly in phyllosilicate-
Anderson, Baldridge, Benton Clark, Blake, Boutlerow, Bridges, Bridges, Clegg, Cloutis, Couch, Cousin, Crowley, Dorothea M. Delapp, Ehlmann, Ethan B. Haldeman, Eugster, Fraeman, Fredrickson, Frydenvang, Furukawa, Garrett, Goldberg, Gooding, Grew, Grotzinger, Grotzinger, Harder, Hesse, Hicks, Hurowitz, Hynek, Ingri, Jens Frydenvang, John C. Bridges, Karahan, Kenneth Herkenhoff, Keren, Keren, Kim, Lahav, Lahav, Lanza, Larralde, Le Mouélic, Lerman, Lodders, Lowenstein, Madeleine R. Bodine, Malin, Mangold, Maurice, Milliken, Morris, Nachon, Nachon, Nina L. Lanza, Orti, Osterloo, Osterloo, Patrick J. Gasda, Perry, Rampe, Rapin, Rhonda McInroy, Ricardo, Roger C. Wiens, Ruiz-Mirazo, Samuel Clegg, Sansonetti, Schubert, Schwenzer, Scorei, Spivack, Stephenson, Susanne P. Schwenzer, Sylvestre Maurice, Tanner, Thomas F. Bristow, Vaniman, Vaniman, Veronica L. Sanford, Wiens, Wiens, William Rapin, Williams, Yen, You   +86 more
core   +6 more sources

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

Sedimentology, EarlyView.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi, Isabel Abad, Elisa Laita, Ali Mokhtar Samet, Matías Reolid   +4 more
wiley   +1 more source

Diagenesis and pore evolution of tight reservoirs in glutenite section of Bachu Formation, Tahe Oilfield

Shiyou shiyan dizhi
The tight reservoirs in the glutenite section of the Carboniferous Bachu Formation in the Tahe Oilfield represent an important future exploration target.
Xindong DIAO, Wenping LI, Dong JIANG, Fangfang ZHOU, Zhipeng HUO, Jianbo GAO, Ningliang SUN, Zhifeng CAO, Jianan WANG, Yanan WANG, Zhiwei CHEN, Changyu DONG   +11 more
doaj   +1 more source

Lattice-Boltzmann and finite-difference simulations for the permeability for three-dimensional porous media

, 2002
Numerical micropermeametry is performed on three dimensional porous samples having a linear size of approximately 3 mm and a resolution of 7.5 $\mu$m. One of the samples is a microtomographic image of Fontainebleau sandstone.
A. Koponen, A. Ladd, A. Tscheschel, B. Biswal, B. Ferréol, C. L. Y. Yeong, C. Manwart, D. Kandhai, D. Noble, F. Harlow, H. Chen, I. Ginzbourg, I. Ginzburg, J. Buick, J. Timonen, M. Gallivan, N. Martys, O. Filippova, P. King, P. Skordos, R. Benzi, R. Hilfer, R. Hilfer, R. Hilfer, R. Hilfer, R. Hilfer, R. Larson, R. Maier, R. Verberg, S. Chen, T. Bourbie, U. Aaltosalmi, X. He, X. Shan, X. Shan, Y. Qian, Z. Lin   +36 more
core   +1 more source

The association of cobalt with iron and manganese (oxyhydr)oxides in marine sediment. [PDF]

, 2010
Formation and dissolution of authigenic Fe and Mn (oxyhydr)oxides influence cycling of trace metals in oxic/suboxic surface sediments.We used the diffusive gradients in thin films technique (DGT) to estimate the association of cobalt with iron and ...
Davison, William, Hamilton-Taylor, John, Stockdale, Anthony, Zhang, Hao   +3 more
core   +1 more source

A tale of two microbialites: Stromatolites and microbially induced sedimentary structures

Sedimentology, EarlyView.
ABSTRACT Microbialites are biosedimentary structures built by microbial mats. Five microbialite groups are distinguished: stromatolites, thrombolites, dendrolites, leiloites and microbially induced sedimentary structures (MISS). This contribution discusses the two most abundant microbialite groups in marine settings, stromatolites and MISS.
Nora Noffke, Stanley M. Awramik
wiley   +1 more source

Sedimentology of silica granules and haematite in the 3.47 Ga Antarctic Creek Member, Mount Ada Basalt, Western Australia

Sedimentology, EarlyView.
ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley   +1 more source

Modern microbial landscape: Aerial mapping of microbially induced sedimentary structures forming in a coastal sabkha

Sedimentology, EarlyView.
ABSTRACT Microbially induced sedimentary structures (MISS) are considered important for understanding primitive life on Earth and for guiding the search for life on other planets. These structures are regarded as macroscopic fossils of early communities of unicellular organisms that did not produce skeletons or shells. In this study, field observations
Tomaso R. R. Bontognali, Axel Bouquety, Ottaviano Rüsch, Brigitte Kuhn, Zulfa Al Disi, Fadhil Sadooni, Nikolaus Kuhn, Jean‐Luc Josset, Hamad Al‐Saad Al‐Kuwari   +8 more
wiley   +1 more source