Dr. Frederick W. Vollmer

Software

As a structural geologist, I spend my time studying and enjoying rock structures from microscopic crenulations to great rifts and mountain belts. I am, however, a compulsive computer programmer. The first geological software I wrote was a strain analysis program for Win Means, using punch cards and Fortran. With the advent of microcomputers, I became enamored with Pascal, but eventually had to turn to languages such as C and C++. Recently I discovered the elegant and powerful open source Free Pascal, and now use it for most of my programming.

This software is freeware, but not public domain, and may not be redistributed or posted elsewhere. It is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. Please read the ReadMe files fully for information on licensing and citation.



Orient Orient is for analyzing orientation data, data that can be described by an axis or direction, or by a position on a sphere or circle. Examples include: latitude and longitude, star locations, bedding planes, fold axes, fault slip directions, paleomagnetic vectors, glacial striations, crystallographic axes, and current flow directions. The image in the side-bar displays ice petrofabric axes from the Blue Mountain Glacier from a study by W. Barclay Kamb. Orient is used by many geologists, but, for example, has been used to track whale migration patterns.
EllipseFit EllipseFit is an integrated program for geological finite strain analysis. It includes routines to digitize and analyze point, line, ellipse, and polygon distributions to determine strain ellipses. It can be used to determine three-dimensional strain ellipsoids from oriented photographs, and is designed for field and laboratory structural geology studies. The graphical interface and multi-platform deployment also make it ideal for teaching in introductory structural geology laboratories.
EllipseFit Antevs, Automated Numerical Time-series Evaluation of Varve Sequences, is a program for analyzing varve sequences and similar time-series data. The program uses Fourier analysis, or other curve fitting algorithms, to remove trends and to normalize the data for comparison. The resulting data series are correlated using cross-correlation techniques to identify potential matches. Editing capabilities allow series renumbering once an unknown series is correlated with a known chronology.
EllipseFit PicTracker is a picture viewing application with tools for organizing large collections. It can quickly browse through folders of image files, and has a slide show mode to give instant full screen presentations. File organization tools include batch moving and deleting files, and batch renaming using powerful regular expressions. PicTracker can split and join large flies to aid in electronic transfer, and can check file CRC's to verify file integrity after transfer.

Gallery

My outdoor activities focus on geology and natural history, and I am an avid photographer. These galleries are accounts of various trips I have taken, a mix of geology excursions, road trips, motorcycle journeys, and backpacking trips. They are probably mainly of interest to friends, family and students, however I use many of the images in my lectures, and these may be of wider scenic or scientific interest. In any case, I enjoyed taking them, and hope you enjoy viewing them.



Gallery Gallery - Photographic accounts of various trips I have taken, a mix of geology excursions, road trips, motorcycle journeys, and backpacking trips. Many may be only of interest to friends, family and students, however I use many of the images in my lectures, and these may be of wider scenic or scientific interest.