The mineralogy and geochemistry of Paleocene shales and interbedded siltstones in the southwestern of Ahar town (NW Iran) were studied by optical microscopy, XRD, SEM, XRF, and ICP-MS techniques. The mineralogical composition, mainly characterized by calcite, quartz, feldspar, dolomite, muscovite, magnesiohornblende, chlorite, illite, montmorionite, palygorskite, and koninckite, suggests relati...

A landslide hazard zonation is a division of the land surface into areas, and the relative ranking of these areas according to degrees of actual or potential hazard from landslides on slopes. Zonation from scientific research does not generally imply legal restrictions, but can be useful to those people who are charged with the land management, by providing them with information that is indispe...

Introduction: One difficulty in explaining the lunar late heavy bombardment (LHB) lies in identifying a source of impactors that survives at ~3.8 to 4 Gyr, so long after planet formation [1,2]. A leading theory is that the LHB was triggered by events in the outer solar system [3,4]. Any model that invokes an outer solar system source for the lunar LHB will also produce an intense bombardment on...

Citizen inquiry is an innovative way for non-professionals to engage in practical scientific activities, in which they take the role of self-regulated scientists in informal learning contexts. This type of activity has similarities to inquiry-based learning and to citizen science, but also important differences. To understand the challenges of supporting citizen inquiry, a prototype system and ...

Citizen inquiry is an innovative way for non-professionals to engage in practical scientific activities, in which they take the role of self-regulated scientists in informal learning contexts. This type of activity has similarities to inquiry-based learning and to citizen science, but also important differences. To understand the challenges of supporting citizen inquiry, a prototype system and ...

Sixty-four female college students attempted to study for a Tests and Measurements examination in a simulated dormitory. During the 30 minute study period, five environmental conditions were cxeated via pre-recorded audio cassettes: actual dormitory noise, rock and roll music, television audio, birds chirping, and silence. Subjects in the dorm noise condition were significantly more negative in...

X-ray microtomography was used to image, at a resolution of 6.6 µm, the pore-scale arrangement of residual carbon dioxide ganglia in the pore-space of a carbonate rock at pressures and temperatures representative of typical formations used for CO2 storage. Chemical equilibrium between the CO2, brine and rock phases was maintained using a high pressure high temperature reactor, replicating condi...