1.) mammals,amphibians,crocodiles,turtles,insects,and land plants survived the cretaceous time.

2.) 1815 was called the year without summer because the volcanic dust, propelled into the stratosphere where it couldn't get rain, sunlight.

3.) Not only was iridium common in the last Cretaceous layers, but also microtektites, which are small glass spheres characteristic of the impact of an asteroid with terrestrial rocks that contain silicon. Shocked quartz grains, characteristic of powerful impacts, were also found.

4.) All this happened, even though the global temperature decreased by only about 2°F (1½12;°C).

5.) The Cretaceous extinction changed the face of biodiversity on Earth. After the large dinosaurs were gone, many large mammals evolved as well as many small ones.

6.) The lower part of the Cretaceous System consists of six stages: the Berriasian, Valanginian, Hauterivian, Barremian, Aptian, and Albian.

7.) Early Cretaceous characteristically deltaic and lacustrine.

8.) Late Cretaceous including marine deposits, such as sandstone and the characteristic chalk, a pure fine-grained white limestone formed largely of planktonic coccoliths.

9.) As continents continued to drift apart, the climate over much of the land became cooler and drier during the Cretaceous.