cretaceous
1.Cretaceous System
2.Cretaceous Period
4.bone-headed dinosaurs; late Cretaceous.
5.duck-billed dinosaurs; upper Cretaceous.
6.armored herbivorous dinosaurs of the Cretaceous.
8.The Cretaceous of the Beijing area
9.8. Jurassic and Cretaceous depressive basin
10.② Jurassic fault, late Cretaceous depression;
