Where have all the Dinosaurs gone?

What happened to the dinosaurs that once roamed the Earth? Dinosaurs had been living for about 200 millions years on earth until all at once it seem they were gone. What could have happened to wipe out these enormous animals with one wave of the hand or so it seemed.

The best theory that gives evidence to this abrupt extinction is that a giant impact by a meteorite was the couplet. There is evidence of a magnificent impact on earth coincides with the demise of the dinosaurs. Lets examine the evidence and see what it reveals.

Dinosaur's final days are traced back to the badland of the western interior of North American. The middle of the American continent there was a large shallow sea; on its western shores was a vast coastal plan, carved into its rivers that drained into the Rocky Mountains. This continent also had many swamps in between. This was perfect dinosaur country; we know this because of all the bones that have been discovered in this area. The swamps are filled with peat fillings; that now has turned into lignite and coal layers, and is often referred to as the Z-coal. This coal layer has been documented as the first coal layer that is above the last remains of the dinosaurs, and is used to mark of the K/T boundary. The above coals contain many ash layers of ash layers; these layers are known as bentonitic clays. The Z-coal layer has a unique layer of clay about less than l-inch thick. That layer has been traced from Albert to New Mexico, a distance of about 1,118 miles. The clay gets thinner from south to north. For along time it was not noticed, but eventually it was identified, because it marked a sudden change in the pollen collection in one place. The pollen data did provide some insight into what might have changed. The sub-tropical deciduous forest were destroyed and replaced with a fern carpet. This fern carpet stayed in place for a few decades and was again turned back to sub-tropical deciduous forest. One theory is that this fern carpet diet could've been a deadly diet for the dinosaurs.

The dinosaurs did not deal very well with the changes in the atmosphere caused by the meteor hitting the earth. The impact must have impacted an unusual target of rocks of thick layers of gypsum and limestone. The impact must have vaporized a very large amount of these gypsum and limestone into dust, along with sulphur oxides and carbon dioxide. This dusting then spread over the entire earth and at the top of the earth atmosphere. This allowed the sun to reflect sunlight back into space; during this process the earth cooled. The dust blocked the Sun. With no Sun no photosynthetic plants or algae would grow. This all happen in a matter of months or years. With little or no food supply a huge mass of mortality occurred. The decaying tress and animals corpses released more carbon dioxide into the atmosphere; this increased the levels already in the earth atmosphere.

The earth cooled for a few years, then, a greenhouse atmosphere warmed the Earth for thousands of years. Was this enough to make the dinosaurs extents? The evidence to suggests that it was.