一、研究意义黑曜岩是一种岩浆喷出型的火山玻璃,其质地优良者经过打制边锋锐利,在远古时代被亚、非、欧、美等大陆的人类广泛用于制作工具,可随身携带并用于远程贸易。由于能够产生遗留至今的黑曜岩的火山数量有限,而不同时段不同地域火山喷发形成的黑 First, the research significance Obsidian is a magma jet-type volcanic glass, its excellent texture after the sharp edge of the winged in ancient times by Asia, Africa, Europe and the United States and other continents are widely used in the production of human tools, but Take it with you and use it for remote trading. Due to the limited number of volcanic rocks that can be produced from obsidian left over to date, black formed by volcanic eruptions from different regions at different periods