• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The extinction of dinosaurs must have been related to a major event. Something enormous had to have happened in order to completely devastate these really massive animals.

Extracts from this document...


Dinosaurs' Extinction: An Incredible Mystery by Shahznane Molou Introduction to Geoscience Dr. Peter Bolton 26 March 2009 Index Content......................................................................................................................................3 Bibliography...............................................................................................................................8 What were the dinosaurs? The first dinosaurs appeared 230 million years ago during the Mesozoic era which is also called "The Age of the Dinosaurs". They survived ice age until a big natural phenomenon hit the earth and extinct them (Buckley, 1997). There were basically two types of dinosaurs living in the earth. They were the Saurischia which were the dinosaurs of similar hips to reptiles of today; and the Ornithischia which were of bird hips. Scientists distinguished the reptilian hips due to the steepness of the hips themselves compared to the other bird-hipped dinosaurs (Power point on Dinosaurs from Dr. Bolton). A huge argument scientists have been through is whether dinosaurs were warm-blooded or cold blooded. The evidences that prove the first argument are the bone structures dinosaurs had which are very similar to us human beings. Their long legs show that dinosaurs were fast runners so there are chances they were warm blooded. However, other scientists also argue that dinosaurs may have been of cold blood due to the fact that most of them had scales like the reptiles, which are cold blooded. ...read more.


The whole food chain then would have got disrupted and everything died out. Scientists discussed that asteroids contain quite a lot of iridium in them (BBC). They argue that as the asteroids hit the earth, the blast was so intense that the iridium spread all across the world in different parts. It was Yan Smith who first discovered the traces of the impacts by finding tiny balls of rocks in the K-T boundary. He claimed that they were the kinds of rocks that were created by really hot effects. In other words, something so hot might have happened in order to leave traces like these tiny balls of rocks, called spherules. When the big asteroid hit the earth, so many rocks may have flown in vapour. And as they landed back onto the earth, they landed with extreme amounts of heat, which may have created huge fires in the whole earth. These fires therefore explain the level of soot that scientists have found in addition to the Iridium in the K-T boundary. It was also said by scientists that the asteroid impact had created the fall of acid rain which was so chemical that it poisoned all water bodies. ...read more.


The food chain was then disrupted again since there were less living species with time going. Because climate changed too radically, dinosaurs could not stand the weather; they would have frozen as they were exothermic (Buckley, 1997). Also, as climate would change, the ice caps would enlarge which would therefore lower the water level in the earth. The dinosaurs would have died due to lack of water. These three theories are not evidences of the true reason to dinosaurs' extinction. Their extinction is still a big mystery to the world researchers. However, one can deduct by comparing and contrasting the three different theories that they are quite similar in a way. Although we might not know the real reason to dinosaurs' extinction, we may deduct that there was a drastic climate change in the earth that made it unbearable for them to live. All scientists are sure of is that such a big phenomenon has occurred at that time that it created gigantic impacts on the climate which resulted in their disappearance. However the answer maybe as simpler as this: that with time the dinosaurs have gradually just come to an end. It is also said an event similar to the K-T event is very likely to happen again if one takes account of the global warming and environmental changes the earth is going through. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our University Degree Ecology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related University Degree Ecology essays

  1. Marked by a teacher

    Examine the reasons for the existence and localities of biodiversity hotspots.

    5 star(s)

    In summary therefore, the existence of biodiversity hotpots may be attributed to a perceived need to preserve maximum species richness in an economically efficient manner. The localities of biodiversity hotpots represent the application of parameters to fulfil these aims. However, although it has been relatively easy to delimit these parameters

  2. Escalated Carbon dioxide level in the atmosphere: The most concerned environmental issue

    picture to date that global warming, CO2 level rise are caused by human activity'' (Soon, et al. 1999). I totally agree with this report since it was inevitable to prevent the rise but the rate of rise was preventable. From burning fossil fuels to deforestation, a lot of other human activities gave rise to the level of carbon dioxide.

  1. What determines the abundance of organisms?

    Similarly studies have shown that herons in the British Isles have a remarkably stable population over long periods of time. In contrast, mice have unstable population levels with long periods of low abundance with intermittent periods of sporadic and dramatic irruptions.

  2. Greenhouse Gas Lab

    They should be positioned in such a manner that variables will remain controlled between the two containers. 5. Measure the carbon dioxide concentration of one container using the probe. Measure for at least 1 minute to ensure an accurate reading.

  1. Free essay

    Restoration Ecology

    created these systems, and lacks the understanding of human and landscape contexts in which processes and ecosystems occur (Parker & Pickett, 1997). Moreover, very often the goals are not being clearly defined neither shared by the community (Hobbs & Harris, 2001).

  2. Discuss the major factors contributing to current reductions in global biodiversity.

    As long as the rate of speciation equals or exceeds the rate of extinction, biodiversity will remain constant or increase. In past geological records, the loss of existing species was eventually balanced of exceeded by the evolution of new species.

  1. Impacts of Climate Change on Loggerhead Turtles

    Their powerful jaws allow them to feed on crustaceans and fragment their hard shells which are discarded to the ocean bottom (Wilson et al., 2003). This increases disintegration and the rate at which shells provide nutrients to the benthic ecosystem.

  2. The estimation of population size and the analysis of spatial distribution in a population ...

    A ratio of 1:1 would indicate a random distribution, if the index of dispersion was greater than 1 then it would be a clumped dispersion, and index of dispersion of less than 1 would indicate a uniform dispersion; Therefore it can be concluded from the results in table 3, which

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work