






Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
property of strain response structural geology materials
Typology: Lecture notes
1 / 10
This page cannot be seen from the preview
Don't miss anything!
*difficult to analyze
Homogenous and Heterogeneous Strain
Homogeneous-originally straight and parallel lines remain straight and parallel after deformation
Original, pre-deformation condition
Heterogeneous-lines do not remain straight and parallel (most common type of strain)
Strain type is a function of scale!
(Simple and Pure Shear)
Simple shear
Pure Shear
Stress and strain axes rotate (large strain)
Stress and strain axes remain parallel (small strain)
General shear-combination of simple and pure shear
(most common in nature)
Elongation
Angular strain Stretch
Volumetric strain: Δ=(V-Vo)/ Vo
Negative Δ: volume loss (compaction; pressure solution) Positive Δ: volume gain (fracturing)
ellipsoid in a rock
shape can be inferred a. passive -no mechanical difference with rock (e.g., ooids in carbonates) b. active -mechanical difference with rock (e.g., quartz pebbles in shale)
active passive
Pure shear
Simple shear