140 Mya to 70 Mya Mesozoic era, Cretaceous period: early and late

132.9 Mya, Early Cretaceous period: Hauterivian. Horned dinosaurs evolve on land as do Eusuchia.

129.4 Mya, Early Cretaceous period: Barremian. Tyrannosaurs, Titanosaurs. duckbills.

125 Mya, Early Cretaceous Period: Aptian. New types of dinosaurs.

113 Mya, E.C. Period: Albian. echinoids and sponges are common.

100.5 Mya, Late Cretaceous Period: Cenomanian. Ammonoidea, belemites, rudist bivalves.

93.9 Mya, Late Cretaceous Period: Turonian. Ammonoidea.

89.8 Mya, Late Cretaceous Period: Coniacian. More modern teleost fish begin to appear.

86.3 Mya, L. C. Period: Santonian. New insects, Ammonoidea.

83.6 Mya, L C. Period: Campanian. Flowering plants and new types of insects.

72.1 Mya, L. C. Period: Maastrichtian. Flowering plants proliferate.