[Rockhounds] The Rock Responsible for Florida’s Cannonball-Eating Spanish Fort

[Paul]

The Mystery of Florida???s Cannonball-Eating Spanish Fort
The secret is inside the walls themselves. By Lina Zeldovich
Atlas Obscura, July 4, 2019
https://www.atlasobscura.com/articles/coquina-fort-in-florida

A paper is:

Subhash, S.G., Jannotti, P. and Subhash, G., 2015. The Impact
Response of Coquina: Unlocking the Mystery Behind the
Endurance of the Oldest Fort in the United States. Journal of
Dynamic Behavior of Materials, 1(4), pp.397-408.
https://link.springer.com/article/10.1007/s40870-015-0035-1

PDF file at:
https://www.researchgate.net/publication/283578095_The_Impact_Response_of_Coquina_Unlocking_the_Mystery_Behind_the_Endurance_of_the_Oldest_Fort_in_the_United_States
https://www.researchgate.net/profile/Phillip_Jannotti

Yours,

Paul H.