............................................................................................................................................ 2 Acknowledgements ........................................................................................................................... 4

Several notable features were found on the surface the asteroid, probably the most interesting being the ponded craters that were discovered in the equatorial regions. These ponded craters appear to be impact craters that were subsequently partially filled with fine grained regolith. The ponded regolith is much younger than the crater itself, implying an impact-independent process for pond crea...

Flexible grids are used in many Geoscience applications because they can accurately adapt to the great diversity of shapes encountered in nature. These grids raise a number difficult challenges, in particular for fast volume visualization. We propose a generic incremental slicing algorithm for versatile visualization of unstructured grids, these being constituted of arbitrary convex cells. The ...

Subsurface models, obtained by structural interpretation of seismic images, underpin all decisions in hydrocarbon exploration and production. The main interest in this field is directed towards the interpretation of horizons and faults: Horizons are strong reflection events which indicate boundaries between rock layering while faults are discrete fractures along which appreciable displacement h...

Data from the U.S. Geological Survey (USGS) collocated-sampler program for the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) are used to estimate the overall error of NADP/NTN measurements. Absolute errors are estimated by comparison of paired measurements from collocated instruments. Spatial and temporal differences in absolute error were identified and are consist...

Geothermal exploration is commonly performed in the absence of 3-D seismics or other high quality methods constraining the geometry of the underlying geological system. Therefore, uncertainty resides in the structural model itself. This is in addition to the usual assumption of stochasticity in the petrophysical properties. We show here that small changes in the geometrical description of the g...

Three-dimensional computer modelling of geological phenomena is rapidly emerging as a field within the already mushrooming science of computer visualization. In geological applications three-dimensional interpretations are routinely performed through the use of two-dimensional map data and knowledge about the geological history of an area. These interpretations are traditionally depicted with i...

Earth scientists acquire and interpret a variety of data in an attempt to define the best description of subsurface geological structures, or an earth model, as the data permit. The generation of numerical meshes derived from an earth model is a necessary critical step to provide specific data representations such as finite difference grids or finite element meshes, including the model geometry...