Which of the following rocks is not formed from pre-existing rocks? by Sunday | Jun 6 | Agricultural Science WAEC | 0 comments A. limestone B. granite C. shale D. marble Correct Answer: Option B B. granite Users Also Read These:Igneous rocks are different from sedimentary rocks by their?Sedimentary rocks are distinguished from other rocks…In which of the following ways are metamorphic rocks formed?The formation of metamorphic rocks normally involves…Igneous rocks formed within the crust are called?