To date, several such secondary craters have been found along Mexico's Yucatan Peninsula, and heat-shocked quartz has been found both in Mexico and in Haiti.
Three-hand analog quartz movement with date display window.
三手石英机芯日期显示窗。
3
Gouge is an information carrier for fault activity, and the motion mode and date of the fault activity can be identified by observation of micro-shape characteristics of quartz in the gouges.