Were the Dinosaurs killed by a meteorite giantess?

A meteorite giantess is a block of rock approximately 10 kilometers in diameter. Rocks of various sizes circulate in the solar system. If one of them approaches the Earth, the force of gravitation attracts it towards planet. It is a heated ball with white which crosses the atmosphere before being crushed. The larger the meteorite is, the more the impact is violent. A meteorite giantess could be inserted very deeply in the ground, causing considerable damage.

The shock would be so intense that the rocks in fusion under the earth's crust would go up on the surface. The oceans are tranformeraient abruptly out of vapor. Gigantic waves, of 1 kilometer top, would submerge the continents close to the point of impact. A mixture of pulverized rocks and water vapor would darken the sky.

Once that the elements would have calmed down, the Earth would be calm, cold and dark. The darkness would last of the months, of the years perhaps.

What would it be occurred of the dinosaurs if a meteorite had run up against planet ? The first impact would have exterminated a great number of animals. But the majority would have continued to live from day to day, disturbed by the cold and the darkness.

In the darkness and the cold, the vegetation started to rarefy. A la fin, With the end, it is nothing any more remained to nourish the herbivores. At the beginning, the carnivores having survived the fall dela meteorite found what to satisfy their hunger: corpses of the dinosaurs killed by the shock, the weak and famished herbivores become of the easy preys. But, with time, food came to miss and the carnivores disappeared in their turn.

Finally, after months, even of the years of darkness, the sky started to be cleared up. A pale sun was shining on the devastated landscape, and the life began again on the Earth. But, this time, all the dinosaurs had disappeared.

Is one certain that that really occurred ? Not really, but of many indices suggest it. In the years 1970, scientists have déouvert that the higher layer of the rock of the Cretaceous was rich in iridium. However, this substance is rare on the surface of the Earth but current on the meteorites. If a meteorite ran up against the Earth at that time, it could leave iridium in the rocks.

In these rocks, the scientists have finds a great number of tektites, small vitreous balls which are formed when jets of rock in fusion cool and are solidified. They could be formed because a meteorite perforated the earth's crust and reached the matter in fusion located below.

The quartz crystals (an ore) are hard and solid. But the quartz fragments found in the rock rich in iridium are cracked and twisted. Undoubtedly because they were subjected to a gigantic explosion

If an enormous meteorite ran up against the Earth, there should remain a trace.In the peninsula of Yucatan, in Mexico, one discovered a crater going back to this time which measures tens kilometers in diameter . It is now buried, but of the sophisticated probes detected it in the depths of the Earth. . The thickest layers of tektites are in this zone.

In north of Mexico and in Texas, one found strange rocks made up of elements which one generally finds in the sea and of fossilized wood, fossilisé, closely interfered and spread like a layer with sediments. As if they had been left by the gigantic waves which submerged the grounds during the fall of a meteorite.

In other parts of the world, to Denmark and in New Zealand, the wood fossilized in the higher layer of the rocks of the Cretaceous appears to have burned. Perhaps because of the heat released by the explosion of the meteorite

The theory of the meteorite convinced more than one scientist. But there are other theories. Some think that all these elements could be also explained by an intense volcanic activity due to the continental drift.

The major part of the Indian territory makes up of lava dating from the Cretaceous. At that time, significant volcanic explosions could veil the Sun behind a screen of dust. The darkness and the cold would then have settled, causing the death of the dinosaurs.

Some scientists believe that the dinosaurs disappeared gradually with CUSE from a cooling from the climate. But the impact of a gigantic meteorite or powerful volcanic eruptions could cause a phenomenon which would be at the origin of the disappearance of the dinosaurs. And the two theories would be good.