Brien Foerster has a book about a cataclysmic event he thinks happened around 12000 years ago and he claims there's evidence of this event on tbe historic structures like the pyramid in Giza. There's erosion and cracking in the basalt stones that indicate an event that involves a great amount of heat. High enough temps to crack a d erode basalt. Im reading the list history of ancient Egypt now but the book I'm talking about is this
https://www.amazon.com/dp/1534907106/ref=cm_sw_r_cp_apa_i_7kJhFbPHGCNKY