Geological Software

The package Fabric8 for Windows consists of 30 strong computer programs for the solution of various problems in structural geology, petrofabrics, neotectonics, rock mechanics, engeneering geology, physical geography, geophysics, and other fields of earth sciences. The programs have been in use for a long time.
Statistical parameters of both three or two dimensionally distributed orientation data (lineation, schistosity, bedding, joints, fold axes, universal stage data) can be calculated and graphically presented in stereonets.
Submaxima in the distribution of orientation data are found and tested for significance.
Displacement data (slickensides and striations) are used to calculate and plot the orientation and shape of paleostress-ellipsoides.
Other programs enable the reconstruction of a data file from a bitmap of a stereonet by clicking on the points.
Several programs analyse fold shapes with Fourier coefficients or with isogon methods.
Strain anlysis can be done with outcrop data (Talbot method) or with images of the distribution of strain markers (Fry method, Panozzo method, Rf-Phi-method).
Structural maps can be plotted from structural data and their coordinates.
The entire package was developed by Eckart Wallbrecher.

CALCULATION of intersecting lines, planes from two lineations, angles between planes or lineations etc,
ROTATION of orientation data around an arbitrary axis with any angle

PLOT OF LINEATIONS OR PLANES in various projections (stereographic, equal area, orthographic, Kavaraiskii),
PLOT OF GREAT CIRCLES in various projections,
PLOT OF SMALL CIRCLES in various projections.

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STATISTICS OF CIRCULAR MEASURES (von Mises distributions), i.e. lineations in remote sensing images, strike lines, flow directions, etc,

ROSE DIAGRAMS

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ROSE DIAGRAMS FROM REMOTE SENSING IMAGES

STATISTICS OF ORIENTATION DATA ( degree of preferred orientation, eigenvalues and -vectors, deviation measures,
cylindricity)

Stereonet, statistics of orientation data

CONTOUR DIAGRAMS with various methods (Contour lines, Mellis method, scalar product, floating contours)

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CLUSTERS OF ORIENTATION DATA (significance tests for submaxima in orientation data distributions)

PALAEO STRESS ANALYSIS: diagrams of the orientation of principal stresses, found with the dihedra method
(contour lines, scalar product, floating contours)

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PLOT SLICKENSIDE PLANES AND STRIATIONS in various projections

PLOT HOEPPENER-DIAGRAMS, construction of striation trajectories and methods of elimination of non-fitting data

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CALCULATION OF THE SHAPE-FACTOR OF A PALAEO STRESS-ELLIPSOID using eigenvalues of the distribution pattern
of displacement data

PLOT OF MOHR'S CIRCLE FOR STRESSES OR FINITE STRAINS

PLOT OF NETS FOR VARIOUS PROJECTIONs with arbitrary inclination of the N-S axis, construction of a grid of counting calottes

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RECONSTRUCTION OF DATA, recalculation of azimuths and angles of dip by mouse clicks on data points in an already existing stereonet, simulation of data by mouse clicks, calculation of max. resolved shear stresses on planes,

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PLOT OF A R%-G%-DIAGRAMM (plot of the degree of preferred orientation vs cylindricity)

WOODCOCK-DIAGRAMM (presentation of eigenvalues of orientation data in a Flinn-like diagram),
VOLLMER-DIAGRAMM (presentation of eigenvalues of orientation data in a triangle diagram)
TEST OF RANDOM DISTRIBUTION

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FOURIER-ANALYSIS OF FOLDS (rotation of a bitmap, y-values of a quarter fold,
and graphic presentation of Fourier-coefficients of fold shapes)

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T'ALPHA/ALPHA-PLOT OF FOLDS (rotation of a bitmap, presentation of isogon lengths in a diagram)

DRAW ISOGONS

SIMULATION OF SHEAR STRAIN (shaer box experiments)

TALBOT-METHOD OF STRAIN ANALYSIS (strain data from shortened and elongated lines)

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FRY-METHOD OF STRAIN ANALYSIS (ellipticity and orientation of a strain ellipse calculated from strain markers)

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STRAIN ANALYSIS WITH THE PROJECTION METHOD (Panozzo method)

STRAINANALYSIS WITH THE Rf/Phi METHOD (Lisle, 1985)

PLOT DATA INTO A MAP (using geographic, Gauss-Krueger, or UTM coordinates)

Last update 30 July, 2008 Changes: Improvement of closed polylines in contour and palaeostress diagrams for export to CorelDraw or Autocad.
Update of the manuals