In northern parts of Iran such as the Alborz Mountain belt, frequent landslides occur due to a combination of climate and geologic conditions with high tectonic activities. This results in millions of dollars of financial damages annually excluding casualties and unrecoverable resources. This paper evaluates the landslide susceptible areas in Central Alborz using the probabilistic frequency rat...

This paper describes a method and a system for visualizing a virtual tunnel through an existing geologic formation and a method for the generation of a camera animation along the tunnel axis. The tunnel is built from geologic data coming from vertical sample drills from the mountain top along the selected tunnel axis. Its wire frame model is then edited by a geologist and image information of t...

background: this study aimed to evaluate the pollution levels of surface water with heavy metals including pb, cd and cr in gheshlagh river, western iran. methods: water and sediment were sampled in five monitoring stations with three replicates in time along the river. the concentration of cr, pb and cd in both water and sediment samples were measured with graphite furnace atomic absorption sp...

This paper demonstrates a feasibility of automated drainage density mapping on regional scales and in high resolution, using remotely sensed elevation data. Such maps offer affordable means of surveying large regions for variability in spatially extended features, which themselves are difficult to sense remotely, but are expressed by the drainage density. We show that the proposed mapping metho...

The boundary between the Sierra Madre Occidental (SMO) and Trans-Mexican Volcanic Belt (TMVB) is well exposed along Santiago River, on border of states Nayarit Jalisco. This region includes a polydeformed belt produced by relative motion Jalisco Block SMO, here defined as “Rio Shear Zone” (RSSZ). In this work, we present detailed geological cartography, petrographic descriptions, new zircon U-P...

Geologic variation has important influences on habitat quality for species of concern, but it can be difficult to evaluate due to subtle variations, complex terminology, and inadequate maps. To better understand habitat of the Apache trout (Onchorhynchus apache or O. gilae apache Miller), a threatened endemic species of the White Mountains of eastcentral Arizona, we reviewed existing geologic r...

The waters of the modern Illinois River flow gently through looping meanders bordered by quiet backwater lakes and drop only a few inches in each river mile. Concealed beneath this gentle river is geologic evidence that the Illinois descended from ancient rivers with surprising and sometimes violent histories. The geologic story of the Illinois River is not only an account of an interesting cha...