Thermal behavior of the Shahreza dolomite ore is investigated in this paper. The hydration of the calcined dolomite was studied as a function of the calcination temperature. The DTA results exhibit three endothermic peaks at 800, 900 and 1050 °C, corresponding to decomposition of MgCO3 and CaCO3, both are present in dolomite and free calcite, respectively. The results also indicated that the de...

Temperate forests provide favorable conditions for carbonate bedrock weathering as the soil CO2 partial pressure is high and soil water is regularly available. As a result of weathering, abiotic CO2 can be released and contribute to the soil CO2 efflux. We used the distinct isotopic signature of the abiotic CO2 to estimate its contribution to the total soil CO2 efflux. Soil cores were sampled f...

The case for a glacial origin for the upper Proterozoic Kingston Peak Formation is weak. Stratigraphic correlations and rock descriptions suggest a marine depositional environment for the entire formation. The Lower Sandstone Unit of the Kingston Peak Formation is best interpreted as an Antediluvian inner shelf deposit. It is underlain by other widespread shelf deposits, the Beck Spring Dolomit...

Introduction: The Yaxcopoil borehole (Yax-1) penetrates below the suevitic units through 600 m of sediments (894.9 m – 1510.9 m). These rocks are most likely of Cretaceous age and are regarded as a displaced “megablock”. The stratified sequence was intruded by suevitic dikes (910 m, 916 m), one impact melt dike (1347 m) and several clastic, polymict dikes. The latter are the focus of this study...

Seismological observations show that many destructive earthquakes nucleate within, or propagate through, thick sequences of carbonates and evaporites. For example, along the Apennines range (Italy) carbonate and evaporite sequences are present at hypocentral depths for recent major earthquakes (5.0oMwo6.3). However, little is known about the frictional properties of these rocks, which are domin...

normal 0 false false false en-us x-none ar-sa in this case report, we present a 30‑year-old man who developed pityriasis rubra pilaris (prp) following exposure to dolomite. the diagnosis of prp was confirmed histologically and the patient was successfully treated with acitretin and cyclosporine.