Dinosaurs Extinction

1698 Words7 Pages
The Extinction Of Dinosaurs Dinosaurs walked the earth for an incredible 165 million years. They first appeared in the late Triassic period, before diversifying to dominate the planet, and become the largest land animals to ever lived. However, their reign was to come to an end. 65 million years ago, dinosaurs and all other creatures died. This extinction was used to mark the boundary between the Cretaceous period, when the last dinosaurs lived, and the Tertiary period, when they became extinct. This is called the K/T boundary. Geologists renamed “Tertiary” to “Paleogene” and the event was called the K/P boundary came as K/T. Since the dinosaur’s disappearance, it has been the only concern and debate of paleontologists who, based on…show more content…
They found evidence of a giant tsunami in the Gull of Mexico, the Caribbean, Spain and Brazil. The dinosaurs were thought to have survived, but the effects left were deadly. Debris took place in the atmosphere and reached space to heat it and cause forest fires. Pieces of ejects settled back down on Earth, leaving dust in the atmosphere that blocked sunlight, causing an impact winter, followed by darkness and cold and low temperatures that stopped photosynthesis and led to the food chains collapsing. Carbon and sulfur contained in the Asteroid were thought to have aggravated these devastating…show more content…
Because of the melting of the North and South ice caps, the sea levels raised and Australia broke away from Antarctica. The fossils found in half of Australia that contain marine molluscs (any invertebrate of the phylum Mollusca like snails, slugs, clams, mussels, cuttlefish, octopuses, etc) and large pre-historic reptiles were evidence of conifers, ferns, flowering plants; The climate changed after that. Between the beginning to mid-Cretaceous, the climate became warmer by 10°C. This climate change was linked it to several volcanic eruptions. At the end of the cretaceous period, the continents were breaking up and volcanoes were diffusing ash and dust and gas into the atmosphere, and this contributed to a climate change again. The climate change would have occurred due to the disruption of wind and
Open Document