Ideal Glass Would Explain Why Glass Exists at All
By Natalie Wolchover, March 11, 2020
https://www.quantamagazine.org/ideal-glass-would-explain-why-glass-exists-at-all-20200311/
https://www.quantamagazine.org/print
The Spanish amber deposits are discussed in:
Delclos, X., Arillo, A., Penalver, E., Barrón, E., Soriano, C., Del Valle,
R.L., Bernárdez, E., Corral, C. and Ortuno, V.M., 2007. Fossiliferous
amber deposits from the Cretaceous (Albian) of Spain. Comptes
Rendus Palevol, 6(1-2), pp.135-149.
https://www.researchgate.net/publication/233864686_Fossilferous_amber_d