The ores of chromite, nickel, copper, and zinc show a wide distribution over geologic time, but those of iron, titanium, lead, uranium, gold, silver, molybdenum, tungsten, and tin are more restricted. Many of the limitations to specific time intervals are probably imposed by the evolving tectonic history of Earth interacting with the effects of the biomass on the evolution of the earth's s surf...

Much of my research career has been spent working both on modern oceanic volcanic systems and at the same time looking at their Archaean counterparts. Many authors have attempted to make inferences on early Earth models based on modern processes which can be increasingly well constrained. In this short review I show how we are beginning to understand and quantify inputs to modern subduction sys...

XML is a popular standard for structured-data transfer using plain text. The tag-set and structures must be defined for each particular application, such as geology. Developing the tag-set thus requires design of an application-domain data-model, which is then serialised as a schema document. A general data-model for geospatial information has been developed and standardised through ISO. The fe...

S FOR THE VENUS GEOSCIENCE TUTORIAL AND VENUS GEOLOGIC MAPPING WORKSHOP

Processes of terrestrial geologic mapping and preparation of geologic maps are supported by Geographic Information Systems (GIS) and respective datamodels of which an assessable number are currently available. Such datamodels help mappers to define spatial geologic map units by integrating field and remote-sensing information and relate them to non-spatial information about unit details, in par...

Mathematical morphology has its applications in both optical and acoustic image analysis and is useful in image cleaning, image enhancement, feature selection and extraction, quantitative analysis, etc. Morphology has the capabilities of performing quantitative analysis of images using morphological operation. Partial differential equation(PDE) is employed for Anisotropic Diffusion filtering te...

Introduction: Improving the temporal constraints of Martian geologic processes is essential for understanding the formational history of the planet and providing adequate context for exploration. Martian surfaces are generally delineated into discrete packages based on morphological, compositional, and/or temporal characteristics, the latter of which are derived through (1) apparent cross-cutti...

In modeling geologic carbon sequestration in a deep inclined aquifer in Wyoming, the impact of geologic, engineering, and environmental uncertainty factors on parameter importance and prediction uncertainty is evaluated. Given site characterization data, a suite of geologic model families were built to represent aquifer permeability heterogeneity at increasing complexity. With each family, the ...

The geotechnical importance of studying fluid flow through porous media and soils in particular, becomes evident when dealing with groundwater movement in surficial geomaterials that can be initiated by hydraulic gradients that develop during construction activity, groundwater extraction, impounding of reservoirs and groundwater recharge during adverse climatic events. In a geotechnical context...