Besides Hell Creek, the most important fossil-bearing deposits in the world are in Qinjiang in China, the Gobi Desert in Mongolia, Campanha in Brazil and Argentine Patagonia.

除地狱溪外，世界上最重要的化石矿床位于中国的秦江、蒙古的戈壁沙漠、巴西的坎帕尼亚和阿根廷的巴塔哥尼亚。