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!
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.