9 Index Properties of Rocks | Geology
(a) For Rocks of Higher Porosity (gt;10%): This test is used for many sedimentary rocks and highly weathered igneous and metamorphic rocks. The rock sample is oven dried at 105#176;C for 12 hours and weighed (W 1) Then the rock sample is immediately coated with paraffin wax or some other material whose density (y p) is wax layer is cooled and the sample is weighed (W 2)