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:'They are formed from the accumulation of materials…Sedimentary rocks are distinguished from other rocks…Rocks which have been formed by the cooling and…The type of rocks formed from the molten magma is known as?The formation of metamorphic rocks normally involves…