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?Which of the following rocks is formed from shale?Igneous rocks formed within the crust are called?Organic sedimentary rocks formed from the?In which of the following ways are metamorphic rocks formed?