In this paper, we discuss the presence of volcanic pozzolans in structural mortars Roman Temple Nora Sardinia (3rd c. AD), represented by pyroclastic rocks (pumices and tuffs) employed as coarse fine aggregates. The provenance these materials from Phlegraean Fields was highlighted through a multi-analytical approach, involving Polarized Light Microscopy on thin sections (PLM), Scanning Electron...

Construction materials from the internal ducts of Aqua Traiana, a still operative Roman aqueduct built in 109 AD to supply water Rome, were characterized by optical microscopy (OM), scanning electron (SEM-EDS), X-ray powder diffraction (XRPD) and microprobe analysis (EMPA). Petrographic XRPD revealed that mortar aggregates are compatible with Vitruvius’ harena fossicia allowed distinction origi...

Abstract Porphyry Mo deposits are important suppliers of molybdenum for industrial applications, but the origin and source metals in these remain debated. Here, we present isotope data Miocene mineralized porphyritic monzogranites (MPMs) Paleocene barren biotite tuffs (BMTs) from Bangpu porphyry (Cu) deposit Gangdese metallogenic belt. The results show that MPMs display radiogenic Sr Pb isotope...

Abstract. Anwar AR, Ala A, Kuswinanti T, Syam’un E. 2022. The ability of potassium-solubilizing fungi isolated from leucite potassium rock deposits. Biodiversitas 23: 6579-6586. Present investigation was aimed to explore the potassium-dissolving some indigenous living in Indonesian tuffs volcanic members Camba Formation Barru Regency, South Sulawesi Province. There are no such findings on recen...

A continuous record of Pliocene-Pleistocene East African volcanic tephra deposition has been developed from a marine sediment sequence at Ocean Drilling Program Sites 721/722 in the Arabian Sea, some 2000 km distant from Ethiopian source volcanoes. The marine depositional sequence is continuous over the Pliocene-Pleistocene interval, has a wealth of published data addressing regional paleoclima...

In the context of valorizing local materials at Saharan region for road constructions, a mixture composed 65% tuff and 35% dune sand (named 65T35DS) was previously studied. The 65T35DS shown to have optimum geotechnical mechanical properties. As an extension, this study consists in investigating behavior under coupled hydro-mechanical loadings. Suction-controlled drying-wetting tests were perfo...

Abstract Tandem in situ and isotope dilution U-Pb analysis of zircons from pyroclastic volcanic rocks both glacial non-glacial sedimentary strata the Pocatello Formation (Idaho, northwestern USA) provides new age constraints on Cryogenian glaciation North American Cordillera. Two dacitic tuffs sampled within glacigenic lower diamictite interval Scout Mountain Member yield high-precision chemica...

This paper is focused on the application of Infrared Thermography to non-standard rock specimens, in terms size and deterioration conditions, Hungarian tuff monitor their cooling process look for a relationship between Cooling Rate Index porosity. Literature data agree potential indirect estimation porosity fresh specimens through IRTest, but this technique has never been tested specimens. To p...

In the Canary Islands and in other parts of world where it can be found its natural state, basaltic tephra, or “Picón” as is known locally, commonly used a soilless substrate for crops. The aim this study to learn more about physical properties Islands’ tuff, find simple method predict hydraulic behaviour these substrates due their heterogeneity. To accomplish this, 32 tuff samples were collect...