Cretaceous2


 * <  ||< =====Cretaceous Peroid===== ||< ===== ===== ||
 * ===== Early-Neocomian =====

144-127 mya
|| ===== Middle- =====

mya
|| ===== Late- =====

mya
|| = ﻿ ﻿ Cretaceous period =

 The Cretaceous period lasted from 144 to 65 million years ago. This period is in the Mesozoic era. In the fist part of this period the least number of mammals and dinosaurs known were living. Also the middle did not have the most dinosaurs in the period. Yet the last part of the period the Senonian in which this part of the period had the most dinosaurs and this is the part of the period that they all got extincted. The big extinction happened in the Cretaceous period, this is where all of the dinosaurs died off and most mammals survived.  In the Cretaceous period; snakes,new kinds of dinosaurs, and insects such as moths and butterfly's evolved. Also flowering plants and flowers that needed assistance from bees evolved too. This made a more efficient way to spread pollen. Also Bacillarophytas appeared which are microscopic organisms that many marine animals eat. The animals that went extinct were mostly just the dinosaurs at the end of the period.

﻿This is what earth looked like in the last part of the Cretaceous period   [] Below is a picture of one of the ways scientists belive dnosaurs got extint was a meteor [] []

This is one of the flowers they believe was evolved when these kinds of flowers started to appear  This is a picture of a Iguanadon a dinosaur from the early Cretaceous period  http://www.google.com/imgres?imgurl=http://www.cmstudio.com/image/Iguanodon017.jpg&imgrefurl=http://www.cmstudio.com/iguanodon.html&usg=__RfuJ7D6VwmvGFLeI1lMSHDtuGUE=&h=480&w=720&sz=93&hl=en&start=83&zoom=1&tbnid=s2YGIYmlqU6UrM:&tbnh=112&tbnw=168&ei=houGTZrAAYiugQf1483ACA&prev=/images%3Fq%3Dcretaceous%2Bperiod%2Bplants%26um%3D1%26hl%3Den%26sa%3DN%26biw%3D1280%26bih%3D578%26tbs%3Disch:10%2C2021& um=1&itbs=1&iact=rc&dur=993&oei=MIqGTYboIOiV0QHxseTBCA&page=5&ndsp=23&ved=1t:429,r:21,s:83&tx=34&ty=62&biw=1280&bih=578

Sites used: http://www.enchantedlearning.com/subjects/Geologictime.html http://www.ucmp.berkeley.edu/help/timeform.html http://earthsci.org/fossils/youngp/periods/periods.html http://www.enchantedlearning.com/subjects/dinosaurs/glossary/Period.shtml

By Elizabeth Anna Paradine