Because contemporaneous paintings often reflect changing tastes in rock collecting, paintings on paper and silk can be used to determine a rock's date in some instances.
(contemporaneous paintings; reflect; changing tastes in rock collecting; T:often) (paintings on paper and silk; can be used; to determine a rock's date in some instances) (paintings on paper and silk; to determine; a rock's date in some instances)
contemporaneous paintings paintings on paper and silk paintings on paper and silk
reflect can be used to determine
changing tastes in rock collecting T:often
to determine a rock's date in some instances
a rock's date in some instances