Special thanks to the Tate Geological Museum
Special thanks to the Greybull Museum
Oklahoma geology
Texas Geology
Wooly Mammoths
diagenesis
Silica-associated proteins from hexactinellid sponges support an alternative evolutionary scenario for biomineralization in Porifera
K Shimizu, M Nishi, Y Sakate, H Kawanami, T Bito, J Arima, L Leria, M Maldonado
Nature Communications, 2024•nature.com
Insight on gem opal formation in volcanic ash deposits from a supereruption: A case study through oxygen and hydrogen isotopic composition of opals from Lake Tecopa, California, U.S.A.
Erwan Martin
By Rob W. M. Van Soest, Nicole Boury-Esnault, Jean Vacelet, Martin Dohrmann, Dirk Erpenbeck, Nicole J. De Voogd, Nadiezhda Santodomingo, Bart Vanhoorne, Michelle Kelly, John N. A. Hooper - Van Soest RWM, Boury-Esnault N, Vacelet J, Dohrmann M, Erpenbeck D, et al. (2012) Global Diversity of Sponges (Porifera). PLoS ONE 7(4): e35105. doi:10.1371/journal.pone.0035105, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=34595288
Insight on gem opal formation in volcanic ash deposits from a supereruption: A case study through oxygen and hydrogen isotopic composition of opals from Lake Tecopa, California, U.S.A.