Answer:
They are no younger than Cretaceous in age.
Explanation:
It is a period in the geologic period which is in between the Jurassic period and the Tertiary periods. It is the period of the Mesozoic era. It is considered to be the longest period in the Phanerozoic Eon.
Thus the two formations that is the Hilltown formation and the Liaoning Formation are same in age as the Cretaceous period.