Cretaceous and Western Interior Seaway

Algae in Cretaceous

200 feet. CaCO3-Coccoliths.

Cretaceous Period

A period when more carnivorous, ferocious Dinosaurs evolved

Deccan Traps

Largest basalt flows on earth, possibly contributed to the mass extinction at the end of the cretaceous.

Chicxulub Meteor

asteroid- ~9 miles wide. Impact crater: 60 miles wide 18 miles deep.

Enantiornithes

dominant bird group during the Cretaceous period. Many Enantiornithes like Rapaxvis and Archaeopteryx

Climate in Cretaceous

increase Co2, increase CH4 (methane), warmer, hot ~90-95 degrees farenheit. More consistent regardless of equator. Break up of Gondwanan=increase coastline, increase rainfall = swampy and tropical rainforest.

Consistent Hot in Cretaceous

no ice =increase seas and 18% land decreases. Hot = no ice = increase seas. Ex: Rainforest over Antarctica and Western Interior Seaway.

Flowering Plants in Cretaceous

ornithischians coevolve, doing very well... warm, H2o available, coevolved with insects and birds as pollinators.