Ellefsen, Karl J.


pick_xwell: A program for interactive picking of crosswell seismic and radar data

Software for interactively picking crosswell seismic and radar data

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check_picks_x: A program for checking the travel time picks of crosswell seismic and radar data

Software for checking the travel time picks of crosswell seismic and radar data

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xwell_radar: A program for calculating crosswell radar traces for layered media

Computer program for calculating crosswell radar traces for layered media

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FD_BH: A program for simulating electromagnetic waves from a borehole antenna

Software for simulating electromagnetic waves from a borehole antenna

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Pick_Sw: A program for interactive picking of S-wave data, version 2.00

Software for interactively picking of S-wave data

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seg2_edit: A program for editing and manipulating SEG-2 files

Scientific data management software

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Field demonstrations of five geophysical methods that could be used to characterize deposits of alluvial aggregate

Data from seismic reflection and refraction, electromagnetic sounding, and resistivity profiling in a study area in Indiana. Exact location is not provided.

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Computer programs for forward and inverse modeling of acoustic and electromagnetic data

Source code and executables for Windows 7 64-bit; these command-line applications are likely portable to Linux as well. Memory intensive code, uses multiple processors.

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A modified procedure for mixture-model clustering of regional geochemical data

<p>A modified procedure is proposed for mixture-model clustering of regional-scale geochemical data. The key modification is the robust principal component transformation of the isometric log-ratio transforms of the element concentrations. This principal

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First steps of integrated spatial modeling of titanium, zirconium, and rare earth element resources within the Coastal Plain sediments of the southeastern United States

This report summarizes the assembly of pertinent data, determination of its limits, analysis of its properties, and the relations among the different data types in preparation for future modeling.

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Geochemical data for Colorado soils-Results from the 2006 state-scale geochemical survey

Major and trace element concentration data for 960 sites, providing a baseline for the natural variation in soil geochemistry in Colorado.

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Titanium mineral resources in heavy-mineral sands in the Atlantic coastal plain of the southeastern United States

This study examined titanium distribution in the Atlantic Coastal Plain of the southeastern United States; the titanium is found in heavy-mineral sands that include the minerals ilmenite (Fe<sup>2+</sup>TiO<sub>3</sub>), rutile (TiO<sub>2</sub>), or leuco

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High-Frequency, Crosswell Radar Data Collected in a Laboratory Tank

Crosswell radar data were collected among three wells in a laboratory tank filled with dry sand. Embedded within the sand was a long plastic box, which was the target for the data collection. Two datasets were collected between each pair of wells, making

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Coastal deposits of heavy mineral sands; Global significance and US resources

Ancient and modern coastal deposits of heavy mineral sands (HMS) are the principal source of several heavy industrial minerals, with mining and processing operations on every continent except Antarctica. For example, HMS deposits are the main source of ti

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Geochemical and mineral maps from soils of the conterminous United States: interactive web site

Interactive web site showing geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS-801

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Geochemical and mineralogical maps for soils of the conterminous United States

Geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS-801

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