Which organisms have been lost during the chalk-Tterni Extinuation event?

chalk-Tercial extinction was the second largest mass extinction of all time, but considerably closer to the third, Ordovice extinction than the first perman-triassic extinction. It is assumed that it has occurred for about 65.5 million years, it is assumed that the extinction event was caused by the massive impact of the asteroid on the Yucatan peninsula in modern Mexico.

The anticipated asteroid caused the chalk-Terio extinction to be approximately 10 km (6 miles) and left the crater at least 180 km (110 miles) wide. The asteroid, which traveled at approximately 17 km/s, arrived at a sharp angle of the passenger to the northwest. The resulting impact would lit up every tree up to about 800 miles from the point of impact and fired more than 80 cubic miles of molten rocks in the direction of the North American continent.

In the next hour, it would be raining molten firing on most of what the United States is now, killing many organisms. Small particles of dust would rise into the stratosphere and remain there and blocked SLUnce for up to ten years. This seriously disrupted photosynthesis and caused the death of many plants.

chalk-Terio extinction devastated life on Earth and sea. Half of all diligence were erased in the oceans, along with numerous bentic foraminifera (important marrobes). Animals that depended on primary production (plants and algae) preferably extinct, while the omnipotent, Detrivor and Mushrooms survived. Numerous groups of cephalopods were extinct, including all ammonites and Belelemniods, iconic sea animals mesozoic. Rudists, a clam to build reefs, as well as about 20% of the shark family and 30% of the echidnoderms (star and relatives). Mosasaurs and Plesiosaurs, two gigantic varieties of sea predator reptiles, also went to exhibit during the event of an extinction of chalk.

Earth animals suffered the greatest losses. All of the non -nian dinosaurs disappeared, including teropods (meat eaters as t. Rex ), sauropoEmployment (huge four times as brachiosaurus ) and Ornithischians (the rest, including herbivors such as triceratops ). The reason for their extinction is probably three times - their large size is that they have a lot of food available, lasted the ability to swim, swim or dive, which means that they should not hide from the worst environmental stresses, and largely depended on primary production (plants).

Meanwhile, after the extinction of the dinosaurs, they began to diversify and prosper: birds who came from dinosaurs, and mammals who have already existed for tens of millions of years as little insects and omnivocci running around in the shadow of dinosaurs.