Question

Which of the following may display two different grain sizes?

a.
metamorphic rock
c.
igneous rock
b.
sedimentary rock
d.
magma

Answer 1

b. sedimentary rock

c. igneous rock

Sedimentary and igneous rocks may display two different pore size. According to a rough estimate the grain size of Sedimentary rocks is 5mm and grain size of igneous rock is 2mm.