Publication-ready geology plots in your browser

Plot planes, poles and lineations on an equal-area or equal-angle net, with contouring.

Turn a column of azimuths into a directional rose, with adjustable bin width and unidirectional or bidirectional petals.

A blank three-component triangle for any composition data — label the apices yourself.

Drop sand/silt/clay percentages onto the USDA triangle and read off the texture class.

Quartz–Feldspar–Lithics point counts on the Dickinson provenance fields.

Classify water types from major-ion chemistry on the classic Piper trilinear plot.

One polygon per sample — the fastest way to see a chemistry change along a flow path.

Semi-log multi-ion profiles that compare absolute concentrations across many samples at once.

Turn sieve and hydrometer results into a semi-log particle-size distribution curve, with D10, D30, D60, Cu and Cc read off for you.

Plot liquid limit against plasticity index on the Casagrande chart, with the A-line and U-line drawn and the USCS group symbol read off.

Turn a table of depth intervals into a publication-ready borehole strip log with USCS hatch patterns, SPT N-values and a water table.

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Draw several borehole logs side by side at true elevation and correlate the strata between them, with pinch-outs, a water table and the vertical exaggeration stated.

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Turn a cone penetration test file into a publication-ready sounding profile — qc, fs, Rf and u2 tracks on one depth axis, with a Robertson (1986) soil behaviour type strip and an interpreted layer table.

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Screen a rock cut for planar sliding, wedge sliding and toppling on a stereonet, with the daylight envelope, friction cone, lateral limits and slip limit drawn and the critical measurements counted.

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Generate Generalized Hoek-Brown strength envelopes from σci, GSI, mi and D — with mb, s, a, the tensile cutoff, rock-mass strength, the equivalent Mohr-Coulomb c′ and φ′ and the rock-mass modulus worked out and cited.

Plot your rock-mass descriptions on the Geological Strength Index chart — blockiness against surface condition, the diagonal GSI contours drawn, and a range rather than a false decimal for every scenario.

Work out Bieniawski (1989) RMR89 from the five published rating tables plus the orientation adjustment — with the rating breakdown drawn as a stacked bar against the class I–V bands, and the GSI and Q correlations printed and cited.

Compute Barton’s Q from RQD, Jn, Jr, Ja, Jw and SRF, then read the support requirement straight off the NGI chart — Q against equivalent dimension, with the nine reinforcement categories drawn and your scenarios plotted on them.

Draw the ground reaction curve, the support characteristic curve and the equilibrium between them for a circular tunnel — with the mobilised support pressure, factor of safety, plastic zone radius and tunnel strain read straight off the figure.

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Fit the Hoek-Brown intact constants σci and mi to triaxial test data by Hoek’s published linear regression, with r², a Mohr-Coulomb c′ and φ′ over the tested range, the tension cutoff and every specimen’s residual.

Pick crack closure, crack initiation, crack damage and peak stress off a uniaxial or triaxial stress–strain record by several published methods at once — with the crack volumetric strain, the lateral strain response, E and ν worked out and every method cited.