Results 31 to 40 of about 24,051 (297)

FROM BIOLOGICAL COLONIZATION TO THE SOIL AND CRUST FORMATION: THE ROLE OF CYANOBACTERIA AND SMALL ANIMALS IN A KARSTIC LANDSCAPE, NORTH OF MINAS GERAIS STATE, BRAZIL

open access: yesRevista Geográfica Acadêmica, 2023
The susceptibility of limestones to biological colonization can be a significant role in the development of karst relief, since the microbial biofilms formation and exopolymeric compounds produced by different metabolic activities, and can influence the ...
Araceli Mendonça de Oliveira   +3 more
doaj  

Discriminating cool-water from warm-water carbonates and their diagenetic environments using element geochemistry: the Oligocene Tikorangi Formation (Taranaki Basin) and the dolomite effect [PDF]

open access: yes, 2004
Fields portrayed within bivariate element plots have been used to distinguish between carbonates formed in warm- (tropical) water and cool- (temperate) water depositional settings.
Nelson, Campbell S.   +5 more
core   +1 more source

H2S Reactions with Limestone and Calcined Limestone.

open access: yesJOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 1995
Sulfur capture reactions of CaCO3-H2S and CaO-H2S have been investigated under various gaseous mixtures conditions using limestone and calcined limestone of 1 mm diameter in a thermogravimetric analyzer.Sulfidation of limestone (CaCO3-H2S) had a very low initial reaction rate and final conversion than the sulfidation of calcined limestone (CaO-H2S) due
Lin, Shi-Ying   +4 more
openaire   +2 more sources

Contrasting carbonate depositional systems for Pliocene cool-water limestones cropping out in central Hawke's Bay, New Zealand [PDF]

open access: yes, 2004
Pliocene limestone formations in central Hawke's Bay (eastern North Island, New Zealand) accumulated on and near the margins of a narrow forearc basin seaway within the convergent Australia/Pacific plate boundary zone.
Nelson, Campbell S.   +5 more
core   +1 more source

Trans-border (South-Eastern Serbia/South-Western Bulgaria) correlations of the Jurassic sediments: The Getic and Supra-Getic units [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2008
The Getic and Supra-Getic are palaeogeographic units in SE Serbia and SW Bulgaria. Based on the presence (in Eastern) or absence (in Western) of Lower Jurassic marine deposits, the Getic is divided into Eastern and Western.
Tchoumatchenco Platon   +4 more
doaj   +1 more source

Microfacies and Depositional Conditions of Jurassic to Eocene Carbonates: Implication on Ionian Basin Evolution

open access: yesGeosciences, 2021
In order to decipher the paleo-depositional environments, during the Late Jurassic to Early Eocene syn-rift stage, at the margins of the Ionian basin, two different areas with exposed long sequences have been selected, Kastos Island (external margin) and
Nicolina Bourli   +3 more
doaj   +1 more source

About the structure of the Kama-Kinel trough system

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
Kama-Kinel Trough System (KKTS) — the structure formed in the Frasnian of the Late Devonian in the vast territory of the Volga-Ural province, is distinguished by the Upper Devonian — Lower Carboniferous deposits.
E. N. Gorozhanina   +3 more
doaj   +1 more source

Limestone Powder

open access: yes, 2017
Fine limestone has been added to Portland cement for decades. This is normally achieved by “intergrinding” it with Portland cement clinker in the cement mill. Under normal operating conditions this will result in a surface area of the limestone fraction of between 800 and 1100 m2/kg (depending on the grindability of the limestone) for a surface area of
Courard, Luc   +2 more
openaire   +1 more source

Importância da reatividade do calcário sobre a produção e algumas característica da cultura da soja Effect of limestone reactivity on soybean crop characteristics and yield

open access: yesScientia Agricola, 1992
O experimento foi conduzido num latossolo vermelho escuro, textura média, localizado em Jaboticabal-SP, para se estudar o efeito de dois calcários (dolomítico e dolomítico calcinado), com quatro graus de finuras (F1 = > 2mm; F2 = 2-0,84 mm; F3 = 0,84-0 ...
P.A. Bellingieri   +3 more
doaj   +1 more source

Unusual Isolated Large Clasts from the Periphery of the Lagonaki Highland, Western Caucasus: New Evidence of Classification and Origin

open access: yesGeosciences, 2018
Large clasts are in focus of the modern geoscience research, but their broadly-accepted classification is absent and specialists tend to over-emphasize on clasts of coastal zones.
Dmitry A. Ruban
doaj   +1 more source

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