Although Brazil is one of the world's leading exporter agricultural products, country highly dependent on importation potassic fertilizers. K-bearing silicate rocks are reported as potential solutions to reduce external K dependency. This work evaluated extraction from Verdete rock, a glauconite-bearing rock containing 10 % K2O, by solubilization with organic acids. Firstly, was reacted during ...

The Aptian sedimentary deposits of the Castro Urdiales area in north Spain record an episode disoxia/anoxia which postdates Oceanic Anoxic Event 1a (OAE 1a). Carbonate platform and overlying facies are analysed for stratigraphy, sedimentology, total organic carbon isotopes. Lower shallow-water limestones covered by deeper-water marlstones organic-carbon-rich black lutites lower to upper Aptian,...

Cappadocia region, rock churches, monasteries, houses, underground settlements, valleys and historical geological formations have unique beauty. The which is rich with its cultural assets belongs to Christian culture in Anatolia, generally known a subject researches. purpose of this study is; understand the wall painting technology 19th century church, make comparison materials churches. materi...

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Small shelly fossils (SSFs) are minute moulded or replaced by apatite, and less commonly, other minerals like glauconite iron oxides. This taphonomic mode is best known from Cambrian deposits, though some occurrences occur across geological time. Instances of small shelly-style preservation were found in insoluble residues the Lower Triassic Virgin Limestone Member exposed southern Nevada, west...

Abstract The complete characteristics knowledge of clay minerals is necessary in the evaluation studies hydrocarbon reservoirs. Ten samples taken from two wells a heterogeneous clastic gas reservoir formation NE Iran were selected to conduct transmission Fourier transform infrared spectroscopy (FTIR) tests for mineralogy studies. FTIR analysis showed that there clear signs all samples. wavenumb...

The Chernevaya taiga is a unique ecosystem formed under the influence of complex geogenic and bioclimatic factors located in foothill border southeastern part Western Siberia. combination local climatic conditions composition parent material led to formation specific soil on territory these habitats. soils have morphogenesis. They thick podzolized horizon are fertile, unlike typical oligotrophi...