Categories Every Day Science Which rocks are formed by the alteration of Pre-existing rocks by great heat or pressure? Post author By esimpk Post date December 14, 2021 No Comments on Which rocks are formed by the alteration of Pre-existing rocks by great heat or pressure? A: Igneous rocks B: Sedimentary rocks C: Metamorphic rocks D: Acid rocks ← The ozone layer is present about 30miles (50 Km) in atmosphere above the Earth The stratum (layer) of atmosphere in which ozone layer lies is called → The most abundant natural Iron Oxided are Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.