Semantic Web technologies bring innovative ideas to computer applications in geoscience. As an essential part of the Semantic Web, ontologies are increasingly discussed in the geoscience community, in which geologic time scale is one of the topics that have received the most discussion and practices. This paper aims to carry out a review of the recent progress on geologic time ontologies, discu...

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...

Introduction Magnetic property data Geologic Setting Comparison of aeromagnetic map data with geologic data Relations between mapped rock units and magnetic anomalies Trends in the magnetic survey data and their relation to geologic features Inferences from textural measures of the aeromagnetic data Textural measures of potential field data Moving window processing Results for one line of an ae...

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...

The gravity and magnetic data measured on the Earth’s surface or above it (collected from an aircraft flying at low altitude) can be used to assist in geologic mapping by estimating the spatial density and magnetization distributions, respectively, presumably confined to the interior of a horizontal slab with known depths to the top and bottom. To estimate density or magnetization distributions...