Results 61 to 70 of about 313 (146)

Mechanical properties of lithic raw materials from Kazakhstan: Comparing chert, shale, and porphyry. [PDF]

PLoS One, 2022
Namen A, Iovita R, Nickel KG, Varis A, Taimagambetov Z, Schmidt P.   +5 more
europepmc   +1 more source

Effects of Silicon and Silicon-Based Nanoparticles on Rhizosphere Microbiome, Plant Stress and Growth. [PDF]

Biology (Basel), 2021
Rajput VD, Minkina T, Feizi M, Kumari A, Khan M, Mandzhieva S, Sushkova S, El-Ramady H, Verma KK, Singh A, Hullebusch EDV, Singh RK, Jatav HS, Choudhary R.   +13 more
europepmc   +1 more source

Interpretation of palaeoweathering features and successive silicifications in theTertiary regolith of Inland Australia.

, 2006
International audienceDetailed studies of morphological, micromorphological and geochemical characteristics of silcretes in the deep bleached and weathered regolith across a large area of inland Australia have provided a new interpretation of the history
Milnes, A.R., Thiry, M., Milnes, Anthony R., Simon-Coincon, R., Rayot, Véronique, Simon-Coinçon, Regine, Rayot, V., Thiry, Médard   +7 more
core   +1 more source

Cuirasses siliceuses ou silcrètes nickélifères dans les profils d'altération de roches ultrabasiques de Côte-d' Ivoire. Rôle des épigénies

, 1979
Dans l'Ouest de la Côte-d'Ivoire, des cuirasses siliceuses se différencient par altération de dunites serpentinisées. L'essentiel de l'accumulation de silice est une qualification issue pro parte d'une dissolution incongruente de minéraux primaires ...
Daniel Nahon
core   +1 more source

The distribution and origin of silcrete in the ogallala formation, Garza County, Texas

, 2011
Silica-cemented sandstone, conglomerate, and caliche intervals (“silcretes”) occur at multiple levels within the Ogallala Formation in Garza County, Texas.
McCoy, Zaneta L.
core  

A study of the post-Permian quartzites of south-eastern New South Wales

, 2009
Silcretes are indurated, silicified quartz-rich rocks. In an attempt to understand the genesis of such rocks, twenty two deposits of post-Permiar. quartzites were chosen for investigation from the widespread occurrences of this rock type in the Tallong ...
John Hardy Callender (20157537)
core  

Homo sapiens origins and evolution in the Kalahari Basin, southern Africa. [PDF]

Evol Anthropol, 2021
Wilkins J.
europepmc   +1 more source

Variance in the response of silcrete to rapid heating complicates assumptions about past heat treatment methods

, 2018
Heat treatment of silcretes in the Middle Stone Age of southern Africa has been taken to indicate complex behaviour among early modern humans. This inference is based on the apparent sensitivity of silcretes to rapid changes in temperature, requiring ...
Alexander Mackay (19588276), Alex Blackwood (20242722), Lachlan Kenna (20242719), Sam Lin (19587178)   +3 more
core  

A new giant sauropod, Australotitan cooperensis gen. et sp. nov., from the mid-Cretaceous of Australia. [PDF]

PeerJ, 2021
Hocknull SA, Wilkinson M, Lawrence RA, Konstantinov V, Mackenzie S, Mackenzie R.   +5 more
europepmc   +1 more source

The Cypress Hills Formation (Upper Eocene to Miocene): a semi-arid braidplain deposit resulting from intrusive uplift

, 1989
The Upper Eocene – Miocene Cypress Hills Formation of the Cypress Hills plateau, in southwestern Saskatchewan and southeastern Alberta, is interpreted as a braidplain deposit.
D. A. Leckie, R. J. Cheel
core   +1 more source