<p>If you can't get a macroscopic sense of lineation, try microscopic measurement  (thin sections along the supposed plane principal stresses) and transfer them in macro. <a href="http://rads.stackoverflow.com/amzn/click/0125769210" rel="nofollow">The Techniques of Modern Structural Geology: Strain Analyses Vol I</a> would be very useful for reference.</p>

CC BY-SA 3.0
2014-08-14T01:03:34.347Z
2014-08-14T01:03:34.347Z
Vasileios Antoniou
<p>This has always bothered me during field mapping: A boudin with two stretching directions has the form of an M&amp;M candy (or almond shape). What do I do to measure the two stretching directions if the surrounding rocks don't show any stretching lineations. Does anybody have experience with this?</p>

CC BY-SA 3.0
2016-04-18T03:45:36.820Z
Can't you just measure the length of the major and minor axes of the ellipse? Or the 3 axes if that is important.
haresfur
CC BY-SA 3.0
2016-07-12T12:11:01.573Z
Have a look: [LINK](https://youtu.be/DX0lFcVp3bA). And for radial boudins here: [LINK](https://youtu.be/w6qcqm1_lUQ).
Bendaua
CC BY-SA 3.0
2014-04-17T14:17:42.143Z
I know nothing of the topic, but +1 for chocolate
gerrit
CC BY-SA 3.0
2014-04-17T14:23:10.553Z
@gerrit It get even funnier if you know that the word boudin means "sausage".
tobias47n9e
<structural-geology><mapping>
How to measure stretching direction on chocolate-tablet boudins?
tobias47n9e
# How to measure stretching direction on chocolate-tablet boudins?

(Asked by: username_0 on 2014-04-17)

This has always bothered me during field mapping: A boudin with two stretching directions has the form of an M&M candy (or almond shape). What do I do to measure the two stretching directions if the surrounding rocks don't show any stretching lineations. Does anybody have experience with this?

**Tags:** structural-geology, mapping

> **Comments:**
> **username_3**: I know nothing of the topic, but +1 for chocolate  
> **username_0**: @username_3 It get even funnier if you know that the word boudin means "sausage".  
> **username_1**: Can't you just measure the length of the major and minor axes of the ellipse? Or the 3 axes if that is important.  
> **username_2**: Have a look: [LINK](https://youtu.be/DX0lFcVp3bA). And for radial boudins here: [LINK](https://youtu.be/w6qcqm1_lUQ).  

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## 1 answers

### Answer by username_4 on 2014-08-14. Score: 4

If you can't get a macroscopic sense of lineation, try microscopic measurement (thin sections along the supposed plane principal stresses) and transfer them in macro. [The Techniques of Modern Structural Geology: Strain Analyses Vol I](http://rads.stackoverflow.com/amzn/click/0125769210) would be very useful for reference.


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