👉 The term "haysel" is a term used in the science of geology to refer to the fossiliferous deposits that are formed when sedimentary rock, such as coal or oil, is subjected to high pressure and高温（高温）作用。
👉 The term "haysel" is a term used in the science of geology to refer to the fossiliferous deposits that are formed when sedimentary rock, such as coal or oil, is subjected to high pressure and高温（高温）作用。
