Dinosaurs beginning with T

Scientists have stated that the main extinction of non-bird dinosaurs is K-T extinction because it occurred in the late Cretaceous to the early Tertiary. Why not use C-T? Geologists use "K" as an abbreviation for Cretaceous. "C" is the previous abbreviation, Cambrian.

The time of the volcanic eruption coincided with the disappearance of the dinosaur, so-called K - T extinction (abbreviation of Cretaceous - Tertiary extinction). In recent years there is increasing evidence that dinosaurs are extinct, but many scientists still support the idea that asteroids are hitting dinosaurs. There are many huge volcanic eruptions in the history of Yellowstone National Park, but according to the US Geological Survey, recent occurrence has occurred about 640,000 years ago. When this huge volcano erupted, it sent about 250 cubic miles (1,000 cubic kilometers) of material to the air. Volcanic eruption leaves hardened areas of lava and caldera, which are formed in the basement when local substances erupt on the ground.

Some people think the volcano has killed the dinosaurs. As the volcano erupts, it causes plenty of dust and debris to bother and hinder the sun, so it means that it does not give plants and plants some dinosaurs need to survive. When it occurred, the lava was thought to immediately burn some dinosaurs and destroy the entire ecological food web. A more general hypothesis is the idea of ​​a comet. Some scientists believe that a huge comet hits the Earth and many dust and debris jumps to block the sun and plants can not grow. Large herbivorous animals need plenty of plants to survive, so they disappear first. Without a large herbivorous animal as a food source, a huge carnivore will die soon. The comet itself crushes many dinosaurs. Only small animals and insects can tolerate this disaster