Results 71 to 80 of about 46,126 (273)

Development of freeze-thaw processing technique for disaggregation of indurated mudrocks and enhanced recovery of calcareous microfossils [PDF]

, 2014
Microfossil extraction from indurated mudrocks is widely acknowledged as challenging, especially for foraminifera. Here we report development of the freeze–thaw extraction method through the addition of rapid heating, detergent and ultrasound stages.
Coe, Angela L., Kennedy, Alice E.
core   +1 more source

Ceramic Production and Geodiversity in Iron Age Iberia: An Archaeometric Study of Pottery from Castrejón de Capote (SW Spain)

Archaeometry, EarlyView.
ABSTRACT The hillfort of Castrejón de Capote is one of the best investigated settlements of Late Iron Age southwest Iberia. Located in the territory that the classical sources attributed to the Celtici, it was occupied between the early 4th and the 1st centuries bce.
Beatrijs de Groot, Luis Berrocal‐Rangel, Manuel Fernández‐Götz   +2 more
wiley   +1 more source

Environmental impact of mineralised black shales

Earth-Science Reviews, 2019
Black shales are sedimentary rocks containing >0.5% of organic carbon. They host polymetallic deposits which have been mined for Cu, Ni, Zn, Mn, P, Mo, V, U, Au and PGE (platinum group elements). Even sub-economic occurrences provide potential risk of acid rock drainage when exposed to oxic surface environment. The natural acid neutralisation potential
Annika Parviainen, Kirsti Loukola-Ruskeeniemi   +1 more
openaire   +4 more sources

The Sydney duricrusts: their terminology and nomenclature [PDF]

, 1970
Two main duricrust types - laterites and ferricretes - and their underlying materials are mapped and described for the northern parts of the Sydney district, New South Wales.
Faniran, Adetoye
core   +1 more source

The climatic significance of Late Ordovician-early Silurian black [PDF]

, 2017
The Ordovician-Silurian transition (455-430 Ma) is characterized by repeated climatic perturbations, concomitant with major changes in the global oceanic redox state best exemplified by the periodic deposition of black shales.
A. Pohl, Adcroft, Adcroft, Algeo, Algeo, Anderson, Armstrong, Armstrong, Armstrong, Arthur, Aumont, Barton, Beaulieu, Bergman, Berner, Berner, Berry, Bickert, Brenchley, Brenchley, Brenchley, Brunetti, Bryant, Came, Chaloner, Cocks, Cocks, Cocks, Cocks, Cramer, Cramer, Cramer, D. Ferreira, Denis, Donnadieu, Dutkiewicz, Edwards, Ekman, Enderton, Falkowski, Ferreira, Ferreira, Finlay, Finnegan, Finney, Follows, Friis, Friis, G. Le Hir, Ganopolski, Garcia, Gent, Ghienne, Gille, Girard, Hammarlund, Haq, Harper, Harper, Heckman, Herrmann, Herrmann, Hoffman, Jenkyns, Jeppsson, Johnson, Jones, Kageyama, Kaljo, Kemp, Kemp, Kump, LaPorte, Large, Laskar, Le Heron, Le Heron, Le Heron, Le Heron, Le Hir, Lenton, Lenton, Litchman, Loi, Long, Loydell, Loydell, Lunt, Luo, Marshall, Marshall, Marshall, Marshall, Marshall, Martin, McKinley, Meinhold, Melchin, Molteni, Monteiro, Montenegro, Moreau, Munnecke, Myhre, Nardin, Och, Osen, Owens, Page, Palastanga, Pohl, Pohl, Pohl, Porada, Poulsen, Poussart, Prange, R Core Team, Rahmstorf, Rasmussen, Redi, Roche, Roche, Rose, Rubinstein, Ruttenberg, Sageman, Schlanger, Schmidt, Servais, Servais, Sheehan, Steemans, Stommel, Stouffer, Sutcliffe, Torsvik, Trabucho-Alexandre, Trotter, Trotter, Tukey, Van Cappellen, Vandenbroucke, Vecoli, Walker, Wallmann, Webby, Winton, Y. Donnadieu, Yamanaka, Yan, Young, Zhang, Zhou, Zhuravlev   +154 more
core   +4 more sources

Cave Palaeolithic of the Ural Mountains – a review

Boreas, EarlyView.
The Ural Mountains are of fundamental importance for studying early human migrations along the geographical limits between Europe and Asia. Geological processes and past climates gave rise to numerous caves, mostly in Palaeozoic carbonate formations.
Jiri Chlachula
wiley   +1 more source

Inorganic geochemistry and petroleum source evaluation of organic black shale in the Mamfe Basin (West Africa)

Solid Earth Sciences, 2019
The shales of the Mamfe basin, West Africa, were studied using inorganic geochemical analysis to investigate the origin of the organic matter, environment of its deposition, paleoproductivity and organic matter preservation, organic matter maturity and ...
Bokanda Ekoko Eric, Ekomane Emile, Njilah Isaac Konfor, Philip Fralick, Bisse Salomon Betrant, Tata Cathryn Ntoboh   +5 more
doaj   +1 more source

Recovery of vanadium from black shale

Transactions of Nonferrous Metals Society of China, 2010
Abstract The recovery of vanadium from a black shale from Guizhou Province of China was performed using a three-step process, which consists of a leaching step in the H2SO4-HF-NaClO system under atmospheric pressure, the vanadium separation from leachate by solvent extraction and stripping, followed by precipitation of ammonium vanadate and thermal ...
Cun-xiong LI, Chang WEI, Zhi-gan DENG, Min-ting LI, Xing-bin LI, Gang FAN   +5 more
openaire   +1 more source

The Carboniferous Southern Pennine Basin, UK [PDF]

, 2014
Many of the Carboniferous outcrops located in the Derbyshire region of the Peak District National Park, UK, have provided sites for both significant and pioneering research relating to the clastic sedimentology of marine palaeoenvironments, particularly ...
Mountney, NP, Pringle, JK, Southern, SJ
core   +4 more sources

Beachrock formation influenced by co‐seismic deformation and relative sea‐level changes during the Holocene near the Gulf of Saros, Türkiye (NE Aegean Sea)

Boreas, EarlyView.
This is the first proof of beachrock found on the nearshore of the Gulf of Saros. Beachrock generation was influenced by tectonic activity, geomorphological processes, and sedimentation. The Late Holocene beachrock deposits were altered by co‐seismic deformation.
Ufuk Tari
wiley   +1 more source