Folds 1: limbs, hinges and planes

Henry Hoult and Kate Pedley
University of Canterbury, School of Earth and Environment

Initial Publication Date: July 9, 2026
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Summary

This workflow uses Visible Geology to explore and visualise key fold characteristics and be able to classify them in 3D space.

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Learning Goals

Learning objectives:

  1. Identify the limbs, axis and axial plane of a fold
  2. Distinguish anticlines from synclines based on how they outcrop at the surface
  3. Measure the amplitude and wavelength of a series of folds
  4. Identify if folds are symmetric or asymmetric
  5. Relate fold geometry to the tectonic history of an area

Key Visible Geology skills:

  1. Apply folds to layers
  2. Manipulate fold orientations

Context for Use

This ~1 hour workflow is a standalone tool for students to either work through as part of a guided lab exercise that builds on lecture material, or as an independent exercise to consolidate learning. It builds concepts from the ground up so it is appropriate for high school to junior college level students.

Description and Teaching Materials

Visible Geology needs to be available for each student, along with the attached worksheet .pdf. Students work through the worksheet, following instructions and exploring the model as it is developed. Key learnings are highlighted in the worksheet at every step. Questions towards the end of the worksheet interrogate students understanding, before an exercise getting them to apply their new knowledge finishes the worksheet.
Workflow handout for Folds 1 (Acrobat (PDF) 13.6MB Jul9 26) 


Teaching Notes and Tips

To save and share their work in Visible Geology, students are encouraged to log in with their Google Account.


Assessment

If students are able to answer the questions and complete the final exercise adequately, then they have met the learning objectives of this workflow.

References and Resources

For tips, tricks and how-to videos for using Visible Geology, check out the Visible Geology Help & Resources.