28 February 2020
Posted by Callan Bentley
The Friday fold is a lovely little sandbox analogue model by Prof. Marco Martins-Ferreira, who posted it on Twitter this week:
As deformation proceeds, you can see the layers develop folds that then morph into faults, shoving deeper layers atop more shallow strata. As a bonus, you can hear Marco’s baby cooing in the background!
Here’s a stabilized, sped-up version, courtesy of Anna Williams:
Happy Friday, all!
Callan Bentley is Associate Professor of Geology at Piedmont Virginia Community College in Charlottesville, Virginia. He is a Fellow of the Geological Society of America. For his work on this blog, the National Association of Geoscience Teachers recognized him with the James Shea Award. He has also won the Outstanding Faculty Award from the State Council on Higher Education in Virginia, and the Biggs Award for Excellence in Geoscience Teaching from the Geoscience Education Division of the Geological Society of America. In previous years, Callan served as a contributing editor at EARTH magazine, President of the Geological Society of Washington and President the Geo2YC division of NAGT.
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Love the sandbox deformation demonstration box. Are the plans available anywhere?
I will ask my brother/architect João Paulo to provide it for us.
Will post it as soon as I have it on https://twitter.com/GeologyMarco
A consulting firm recently posted about a similar exercise they showcased at a conference:
https://www.linkedin.com/posts/terrane-aerial-mapping_pdac2020-structuralgeology-activity-6640288359572922368-Aym-
So much can be learned by working with physical models – we should be using these way more often!
Thankyou so much for posting his video. We live in the Alberta coda Rockies. Our hikes and walks take us past the the rocks but we can’t always read their stories. This is a beautiful way to have them make sense. I plan to go down the “rabbit hole” to find more explanations for me and my grandchildren.