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Structural Geology

Hi,

This is a collection of Python Jupyter Notebooks for Structural Geology, and especially for my Bachelor course Structural Geology. The material is organized as:

  1. Data in the data folder
  2. Figures in the figures folder
  3. Functions in the functions folder
  4. Notebooks in the notebooks folder

The best way to run the notebooks is in VSCode. Note that in VSCode you will need to install the Python and Jupyter extensions. And of course you will need a Python distribution, the base environment of the Anaconda distribution works fine.

The list of the notebooks grouped by topic is as follows:

Orientations

1- Orientation
2- Vectors
3- Vector operations
4- Three points problem
5- Thickness
6- Outcrop trace
7- Rule of Vs
9- Rotations

Stereonet

10- Lines in the stereonet
11- Planes in the stereonet
12- Small circles in the stereonet
13- A full stereonet

Uncertainties

14- Uncertainties
41- Uncertainty in shortening estimates

Cylindrical and planar best-fit

15- Cylindrical best fit
16- Best-fit plane

Strain

17- Infinitesimal strain
18- Finite strain
19- Pure shear
20- Simple shear
21- General shear
22- Mohr Circle for finite strain
23- The Fry method
32- P and T axes

Stress

24- Stress
25- Mohr Circle for stress
26- Normal and shear tractions on plane
27- Mohr Circle for stress in 3D
28- Slip tendency
44- Dilation tendency
29- The failure envelope
30- Which fault is more likely?
31- Faults and stress magnitudes
40- Stress polygon
45- Stress distributions and faulting

Folds

8 - Downplunge projection
33- Dip isogons
34- Fault bend folds
46- Rollover folds
35- Fixed axis fault propagation folds
36- Parallel fault propagation folds
37- Trishear fault propagation folds
38- Tectono-sedimentary model
42- Trishear inverse modelling
43- Trishear modelling of Shijia trench site

Salt

47 - Salt minibasins: The DRAWL model
48 - Ramp-syncline basins: The SaltDragon model

Geophysics

39- Seismic imaging

If you have any questions, please contact me at nestor.cardozo@uis.no.

Last updated: July 11, 2026

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A collection of Python scripts for structural geology

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Readme
MIT license
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43 stars

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2 watching

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Structural Geology
Hi,



This is a collection of Python Jupyter Notebooks for Structural Geology, and especially for my Bachelor course Structural Geology. The material is organized as:
  1. Data in the data folder
  2. Figures in the figures folder
  3. Functions in the functions folder
  4. Notebooks in the notebooks folder
The best way to run the notebooks is in VSCode. Note that in VSCode you will need to install the Python and Jupyter extensions. And of course you will need a Python distribution, the base environment of the Anaconda distribution works fine.
The list of the notebooks grouped by topic is as follows:
Orientations
1- Orientation

2- Vectors

3- Vector operations

4- Three points problem

5- Thickness

6- Outcrop trace

7- Rule of Vs

9- Rotations
Stereonet
10- Lines in the stereonet

11- Planes in the stereonet

12- Small circles in the stereonet

13- A full stereonet
Uncertainties
14- Uncertainties

41- Uncertainty in shortening estimates
Cylindrical and planar best-fit
15- Cylindrical best fit

16- Best-fit plane
Strain
17- Infinitesimal strain

18- Finite strain

19- Pure shear

20- Simple shear

21- General shear

22- Mohr Circle for finite strain

23- The Fry method

32- P and T axes
Stress
24- Stress

25- Mohr Circle for stress

26- Normal and shear tractions on plane

27- Mohr Circle for stress in 3D

28- Slip tendency

44- Dilation tendency

29- The failure envelope

30- Which fault is more likely?

31- Faults and stress magnitudes

40- Stress polygon

45- Stress distributions and faulting
Folds
8 - Downplunge projection

33- Dip isogons

34- Fault bend folds

46- Rollover folds

35- Fixed axis fault propagation folds

36- Parallel fault propagation folds

37- Trishear fault propagation folds

38- Tectono-sedimentary model

42- Trishear inverse modelling

43- Trishear modelling of Shijia trench site
Salt
47 - Salt minibasins: The DRAWL model

48 - Ramp-syncline basins: The SaltDragon model
Geophysics
39- Seismic imaging
If you have any questions, please contact me at nestor.cardozo@uis.no.
Last updated: July 11, 2026
About
A collection of Python scripts for structural geology
Resources
Readme
MIT license
Activity
Stars
43 stars
Watchers
2 watching
Forks
10 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Structural Geology
Hi,



This is a collection of Python Jupyter Notebooks for Structural Geology, and especially for my Bachelor course Structural Geology. The material is organized as:
  1. Data in the data folder
  2. Figures in the figures folder
  3. Functions in the functions folder
  4. Notebooks in the notebooks folder
The best way to run the notebooks is in VSCode. Note that in VSCode you will need to install the Python and Jupyter extensions. And of course you will need a Python distribution, the base environment of the Anaconda distribution works fine.
The list of the notebooks grouped by topic is as follows:
Orientations
1- Orientation

2- Vectors

3- Vector operations

4- Three points problem

5- Thickness

6- Outcrop trace

7- Rule of Vs

9- Rotations
Stereonet
10- Lines in the stereonet

11- Planes in the stereonet

12- Small circles in the stereonet

13- A full stereonet
Uncertainties
14- Uncertainties

41- Uncertainty in shortening estimates
Cylindrical and planar best-fit
15- Cylindrical best fit

16- Best-fit plane
Strain
17- Infinitesimal strain

18- Finite strain

19- Pure shear

20- Simple shear

21- General shear

22- Mohr Circle for finite strain

23- The Fry method

32- P and T axes
Stress
24- Stress

25- Mohr Circle for stress

26- Normal and shear tractions on plane

27- Mohr Circle for stress in 3D

28- Slip tendency

44- Dilation tendency

29- The failure envelope

30- Which fault is more likely?

31- Faults and stress magnitudes

40- Stress polygon

45- Stress distributions and faulting
Folds
8 - Downplunge projection

33- Dip isogons

34- Fault bend folds

46- Rollover folds

35- Fixed axis fault propagation folds

36- Parallel fault propagation folds

37- Trishear fault propagation folds

38- Tectono-sedimentary model

42- Trishear inverse modelling

43- Trishear modelling of Shijia trench site
Salt
47 - Salt minibasins: The DRAWL model

48 - Ramp-syncline basins: The SaltDragon model
Geophysics
39- Seismic imaging
If you have any questions, please contact me at nestor.cardozo@uis.no.
Last updated: July 11, 2026
About
A collection of Python scripts for structural geology
Resources
Readme
MIT license
Activity
Stars
43 stars
Watchers
2 watching
Forks
10 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Structural Geology
Hi,



This is a collection of Python Jupyter Notebooks for Structural Geology, and especially for my Bachelor course Structural Geology. The material is organized as:
  1. Data in the data folder
  2. Figures in the figures folder
  3. Functions in the functions folder
  4. Notebooks in the notebooks folder
The best way to run the notebooks is in VSCode. Note that in VSCode you will need to install the Python and Jupyter extensions. And of course you will need a Python distribution, the base environment of the Anaconda distribution works fine.
The list of the notebooks grouped by topic is as follows:
Orientations
1- Orientation

2- Vectors

3- Vector operations

4- Three points problem

5- Thickness

6- Outcrop trace

7- Rule of Vs

9- Rotations
Stereonet
10- Lines in the stereonet

11- Planes in the stereonet

12- Small circles in the stereonet

13- A full stereonet
Uncertainties
14- Uncertainties

41- Uncertainty in shortening estimates
Cylindrical and planar best-fit
15- Cylindrical best fit

16- Best-fit plane
Strain
17- Infinitesimal strain

18- Finite strain

19- Pure shear

20- Simple shear

21- General shear

22- Mohr Circle for finite strain

23- The Fry method

32- P and T axes
Stress
24- Stress

25- Mohr Circle for stress

26- Normal and shear tractions on plane

27- Mohr Circle for stress in 3D

28- Slip tendency

44- Dilation tendency

29- The failure envelope

30- Which fault is more likely?

31- Faults and stress magnitudes

40- Stress polygon

45- Stress distributions and faulting
Folds
8 - Downplunge projection

33- Dip isogons

34- Fault bend folds

46- Rollover folds

35- Fixed axis fault propagation folds

36- Parallel fault propagation folds

37- Trishear fault propagation folds

38- Tectono-sedimentary model

42- Trishear inverse modelling

43- Trishear modelling of Shijia trench site
Salt
47 - Salt minibasins: The DRAWL model

48 - Ramp-syncline basins: The SaltDragon model
Geophysics
39- Seismic imaging
If you have any questions, please contact me at nestor.cardozo@uis.no.
Last updated: July 11, 2026
About
A collection of Python scripts for structural geology
Resources
Readme
MIT license
Activity
Stars
43 stars
Watchers
2 watching
Forks
10 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Structural Geology
Hi,



This is a collection of Python Jupyter Notebooks for Structural Geology, and especially for my Bachelor course Structural Geology. The material is organized as:
  1. Data in the data folder
  2. Figures in the figures folder
  3. Functions in the functions folder
  4. Notebooks in the notebooks folder
The best way to run the notebooks is in VSCode. Note that in VSCode you will need to install the Python and Jupyter extensions. And of course you will need a Python distribution, the base environment of the Anaconda distribution works fine.
The list of the notebooks grouped by topic is as follows:
Orientations
1- Orientation

2- Vectors

3- Vector operations

4- Three points problem

5- Thickness

6- Outcrop trace

7- Rule of Vs

9- Rotations
Stereonet
10- Lines in the stereonet

11- Planes in the stereonet

12- Small circles in the stereonet

13- A full stereonet
Uncertainties
14- Uncertainties

41- Uncertainty in shortening estimates
Cylindrical and planar best-fit
15- Cylindrical best fit

16- Best-fit plane
Strain
17- Infinitesimal strain

18- Finite strain

19- Pure shear

20- Simple shear

21- General shear

22- Mohr Circle for finite strain

23- The Fry method

32- P and T axes
Stress
24- Stress

25- Mohr Circle for stress

26- Normal and shear tractions on plane

27- Mohr Circle for stress in 3D

28- Slip tendency

44- Dilation tendency

29- The failure envelope

30- Which fault is more likely?

31- Faults and stress magnitudes

40- Stress polygon

45- Stress distributions and faulting
Folds
8 - Downplunge projection

33- Dip isogons

34- Fault bend folds

46- Rollover folds

35- Fixed axis fault propagation folds

36- Parallel fault propagation folds

37- Trishear fault propagation folds

38- Tectono-sedimentary model

42- Trishear inverse modelling

43- Trishear modelling of Shijia trench site
Salt
47 - Salt minibasins: The DRAWL model

48 - Ramp-syncline basins: The SaltDragon model
Geophysics
39- Seismic imaging
If you have any questions, please contact me at nestor.cardozo@uis.no.
Last updated: July 11, 2026
About
A collection of Python scripts for structural geology
Resources
Readme
MIT license
Activity
Stars
43 stars
Watchers
2 watching
Forks
10 forks
Report repository
Releases
Packages
Contributors
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Structural Geology
Hi,



This is a collection of Python Jupyter Notebooks for Structural Geology, and especially for my Bachelor course Structural Geology. The material is organized as:
  1. Data in the data folder
  2. Figures in the figures folder
  3. Functions in the functions folder
  4. Notebooks in the notebooks folder
The best way to run the notebooks is in VSCode. Note that in VSCode you will need to install the Python and Jupyter extensions. And of course you will need a Python distribution, the base environment of the Anaconda distribution works fine.
The list of the notebooks grouped by topic is as follows:
Orientations
1- Orientation

2- Vectors

3- Vector operations

4- Three points problem

5- Thickness

6- Outcrop trace

7- Rule of Vs

9- Rotations
Stereonet
10- Lines in the stereonet

11- Planes in the stereonet

12- Small circles in the stereonet

13- A full stereonet
Uncertainties
14- Uncertainties

41- Uncertainty in shortening estimates
Cylindrical and planar best-fit
15- Cylindrical best fit

16- Best-fit plane
Strain
17- Infinitesimal strain

18- Finite strain

19- Pure shear

20- Simple shear

21- General shear

22- Mohr Circle for finite strain

23- The Fry method

32- P and T axes
Stress
24- Stress

25- Mohr Circle for stress

26- Normal and shear tractions on plane

27- Mohr Circle for stress in 3D

28- Slip tendency

44- Dilation tendency

29- The failure envelope

30- Which fault is more likely?

31- Faults and stress magnitudes

40- Stress polygon

45- Stress distributions and faulting
Folds
8 - Downplunge projection

33- Dip isogons

34- Fault bend folds

46- Rollover folds

35- Fixed axis fault propagation folds

36- Parallel fault propagation folds

37- Trishear fault propagation folds

38- Tectono-sedimentary model

42- Trishear inverse modelling

43- Trishear modelling of Shijia trench site
Salt
47 - Salt minibasins: The DRAWL model

48 - Ramp-syncline basins: The SaltDragon model
Geophysics
39- Seismic imaging
If you have any questions, please contact me at nestor.cardozo@uis.no.
Last updated: July 11, 2026
About
A collection of Python scripts for structural geology
Resources
Readme
MIT license
Activity
Stars
43 stars
Watchers
2 watching
Forks
10 forks
Report repository
Releases
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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.gitignore
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LICENSE
README.md
README.md
Repository files navigation
Structural Geology
Hi,



This is a collection of Python Jupyter Notebooks for Structural Geology, and especially for my Bachelor course Structural Geology. The material is organized as:
  1. Data in the data folder
  2. Figures in the figures folder
  3. Functions in the functions folder
  4. Notebooks in the notebooks folder
The best way to run the notebooks is in VSCode. Note that in VSCode you will need to install the Python and Jupyter extensions. And of course you will need a Python distribution, the base environment of the Anaconda distribution works fine.
The list of the notebooks grouped by topic is as follows:
Orientations
1- Orientation

2- Vectors

3- Vector operations

4- Three points problem

5- Thickness

6- Outcrop trace

7- Rule of Vs

9- Rotations
Stereonet
10- Lines in the stereonet

11- Planes in the stereonet

12- Small circles in the stereonet

13- A full stereonet
Uncertainties
14- Uncertainties

41- Uncertainty in shortening estimates
Cylindrical and planar best-fit
15- Cylindrical best fit

16- Best-fit plane
Strain
17- Infinitesimal strain

18- Finite strain

19- Pure shear

20- Simple shear

21- General shear

22- Mohr Circle for finite strain

23- The Fry method

32- P and T axes
Stress
24- Stress

25- Mohr Circle for stress

26- Normal and shear tractions on plane

27- Mohr Circle for stress in 3D

28- Slip tendency

44- Dilation tendency

29- The failure envelope

30- Which fault is more likely?

31- Faults and stress magnitudes

40- Stress polygon

45- Stress distributions and faulting
Folds
8 - Downplunge projection

33- Dip isogons

34- Fault bend folds

46- Rollover folds

35- Fixed axis fault propagation folds

36- Parallel fault propagation folds

37- Trishear fault propagation folds

38- Tectono-sedimentary model

42- Trishear inverse modelling

43- Trishear modelling of Shijia trench site
Salt
47 - Salt minibasins: The DRAWL model

48 - Ramp-syncline basins: The SaltDragon model
Geophysics
39- Seismic imaging
If you have any questions, please contact me at nestor.cardozo@uis.no.
Last updated: July 11, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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Structural Geology
Hi,



This is a collection of Python Jupyter Notebooks for Structural Geology, and especially for my Bachelor course Structural Geology. The material is organized as:
  1. Data in the data folder
  2. Figures in the figures folder
  3. Functions in the functions folder
  4. Notebooks in the notebooks folder
The best way to run the notebooks is in VSCode. Note that in VSCode you will need to install the Python and Jupyter extensions. And of course you will need a Python distribution, the base environment of the Anaconda distribution works fine.
The list of the notebooks grouped by topic is as follows:
Orientations
1- Orientation

2- Vectors

3- Vector operations

4- Three points problem

5- Thickness

6- Outcrop trace

7- Rule of Vs

9- Rotations
Stereonet
10- Lines in the stereonet

11- Planes in the stereonet

12- Small circles in the stereonet

13- A full stereonet
Uncertainties
14- Uncertainties

41- Uncertainty in shortening estimates
Cylindrical and planar best-fit
15- Cylindrical best fit

16- Best-fit plane
Strain
17- Infinitesimal strain

18- Finite strain

19- Pure shear

20- Simple shear

21- General shear

22- Mohr Circle for finite strain

23- The Fry method

32- P and T axes
Stress
24- Stress

25- Mohr Circle for stress

26- Normal and shear tractions on plane

27- Mohr Circle for stress in 3D

28- Slip tendency

44- Dilation tendency

29- The failure envelope

30- Which fault is more likely?

31- Faults and stress magnitudes

40- Stress polygon

45- Stress distributions and faulting
Folds
8 - Downplunge projection

33- Dip isogons

34- Fault bend folds

46- Rollover folds

35- Fixed axis fault propagation folds

36- Parallel fault propagation folds

37- Trishear fault propagation folds

38- Tectono-sedimentary model

42- Trishear inverse modelling

43- Trishear modelling of Shijia trench site
Salt
47 - Salt minibasins: The DRAWL model

48 - Ramp-syncline basins: The SaltDragon model
Geophysics
39- Seismic imaging
If you have any questions, please contact me at nestor.cardozo@uis.no.
Last updated: July 11, 2026
About
A collection of Python scripts for structural geology
Resources
Readme
MIT license
Activity
Stars
43 stars
Watchers
2 watching
Forks
10 forks
Report repository
Releases
Packages
Contributors
Languages