Flora[ edit ] Although the first representatives of leafy trees and true grasses emerged in the Cretaceous, the flora was still dominated by conifers like Araucaria Here:
The cretaceous period and the aftermath The cretaceous period and the aftermath 6 June Dinosaur The Cretaceous Period and the Aftermath Imagine a great, thickly muscled dinosaur.
See those serrated teeth? And the great yellow eye that is pondering whether you are food or foe? Now, imagine something that can kill this beast and all of its kind.
The Cretaceous Tertiary Extinction Event was actually a geologically short period of time. It is known as the K-T extinction event. The K-T boundary is a thin band of sedimentation found in various parts of the world. The thin band of sedimentation marking the K- T boundary line Did you know that the K stands for Cretaceous period?
The T stands for Tertiary period.
This boundary marks the end of the Mesozoic Era, and it marks the beginning of the Cenozoic era. This was a large scaled mass extinction event.
It may have been caused by one or more catastrophes. On March 4,a panel of 41 scientists agreed that the Chicxulub asteroid riggered the mass extinction. Although, several impact craters such as in the Deccan Traps may have caused it. With such a catastrophic The Chicxulub Crater in Mexico event as this, evolution is sure to occur because of it.
Our understanding of evolution does not depend on our non-understanding of how it began.
Right now the scientists believe that complex life cam from simple chemical reactions. Not much is clear about he structure of the first living things and life.
Also, there is no scientific consensus on how evolution began. But what we do know is that this event killed the dinosaurs and set evolution in motion.
Evidence of the Deccan Traps on a hillside The Deccan Traps are one of the theories of dinosaur extinction. These were a series of floods that was thought to have been the gradual extinction of the dinosaurs. The Deccan Traps were thought to have lasted over 2 million years.
Recent evidence shows that the traps erupted overyears ago and may have led to the extinction.The Cretaceous Tertiary Extinction event occurred 5 million years ago, and was a geologically short period of time. It was known as the K-T extinction event, and has since become famous.
The event is associated with the K-T boundary, which is a thin band of sedimentation found . It began in the aftermath of the mass extinction event that occurred at the very end of the Cretaceous Period (the so-called K-T boundary), when as much as 80 percent of .
A study that examined the shape of hundreds of fossilized shark teeth suggests that modern shark biodiversity was triggered by the end-Cretaceous mass extinction event, about 66 million years ago.
In addition, newly discovered fossil representatives of living groups of birds from the period shortly after the impact appear to have been ground dwellers, based on the proportions of their legs.
The Cretaceous (/ k r ɪ ˈ t eɪ ʃ ə s /, kri-TAY-shəs) is a geologic period and system that spans 79 million years from the end of the Jurassic Period million years ago to the beginning of the Paleogene Period 66 mya. It is the last period of the Mesozoic Era, and the longest period of the Phanerozoic Eon.
The Cretaceous Period, a time known for extended duration of warmest periods of Earth’s history, provides an approximate corollary for understanding the possible impacts of ongoing global warming.