BC: Made By: Kyrillos Awad
FC: Kyrillos Awad | March 11, 2013 7-3
1: My topic is about the Phanerozoic Eon. Table of contents Topic Page Time 2 What was happening 4 Plants 6, 7, 8 Animals 10, 11, 12 Climate 14, 15 Summary 16, 17 Bibliography 18 The End 19
2: Time that my topic occurred. | My topic occurred 544 million years ago (mya).
4: What happened during this time? | The Phanerozoic period is one of the oldest eons ever. It had lots of types of plants that really helped make the place more beautiful and helped increase the amount of oxygen in the atmosphere. There weren't a lot of animals because of how cold the climate was. The environment was harsh and there was little oxygen in the air which made it impossible for any organism to live.
6: Plants | There were a lot of plants that helped fill the atmosphere with oxygen during the Phanerozoic period due to photosynthesis. During the Phanerozoic period, there weren't a lot of new species, so that means that there weren't any new fossils found from that period. For example, ancient floras (plants) went through great changes. Other types of terrestrial vegetation such as ferns, cycads, ginkgophytes, bennettituleans, and other unusual plants dominated the Phanerozoic.
7: Many plants evolved from ancient plants. They might have come from the Cretaceous period or in the early Triassic period. Angiosperms began to diversify in the Cretaceous period largely taking over from the other plant groups. And modern gymnosphers, such as conifers, first appeared in their current form in the early Triassic period came to the Phanerozoic a little while later. New plants also appeared during the period. Ginkgos first appeared 150 million years ago and became common in the Mesozoic Era.Ferns were the dominant understory
8: plants, with a variety of foliage types. Fern, tree ferns, cycads, and cycadoides created the middle story of foliage. As you can see, there were a lot of types of plants that evolved or survived from the earlier period.
10: Animals | During the Phanerozoic period, there weren't a lot of animals because there wasn't a lot of oxygen in the air, which made it a challenge for the animals to live. But some animals were able to survive. There were the eukaryotes like eubacteria and archae bacteria, which are two types of bacteria. But then something in the atmosphere changed. A long time ago, there was a huge increase in atmospheric oxygen and the eukaryotes evolved. In addition to unicellular eukaryotes, multicellular eukaryotes evolved.
11: Another reason there wasn’t a lot of new animals was because they were either extinct or from the Precambrian time. But there were also animals that were new for the Phanerozoic or survived until the Phanerozoic from the earlier times. The animals that lived during the Phanerozoic were Anamaloearis, Duncleoteus, Tiktilak and many others. There were also animals that we know like dinosaurs and some still live till today like mammals, turtles, crocodiles, and frogs. All together, even though the climate wasn’t the
12: right place for the animals to live, they were still able to survive the harsh environment.
14: Climate | The Phanerozoic period means “related to”. It started 542 million years ago (mya) until the present day, which means it represents a relatively brief period of half a billion years. There were three eras in the Phanerozoic: the Paleozoic, the Mesozoic, and the Cenozoic, encompassing the latest one tenth of geological timing. The Phanerozoic also has eleven geological periods after the three eras. The Phanerozoic started after the end of the Precambrian time. Overall, the climate during the Phanerozoic wasn't
15: the best climate that you can live through, but it eventually changed and became better. During the Phanerozoic, the climate was really bad and it wasn’t suitable for any organism to live in it. The Phanerozoic had little oxygen. And the temperature wasn’t suitable for any organism to live in. Most of the time, the temperature was really cold. It is estimated that each one part per thousand changes represents roughly a 1.5-2 C change in tropical sea surface temperatures.
16: Summary | The Phanerozoic Eon had a huge increase in plant life which was really helpful during that time. It helped fill the atmosphere with the right amount of oxygen for organisms. There were also a lot of beautiful looking plants and a lot of different types. They all helped the atmosphere and helped make the environment look nice. There weren't a lot of animals during the period due to the lack of oxygen in the atmosphere and how cold the climate was, but all the animals that
17: lived were able to adapt to the climate and were able to survive that period, some even until today. Some of the animals that were capable of living through that weather are Keuper, Muschelkalk, Buntsandstein, and white Jurassic. And that is something special about each animal that only some animals have that. And that is why the Phanerozoic Eon is a very special period.
18: Bibliography | Alden, Andrew. "Geologic Time Scale: The Phanerozoic Eon." About.com Geology. N.p., 2009. Web. 04 Feb. 2013. Kazlew, M. Alan. "The Phanerozoic Eom." Paleos.com. N.p., n.d. Web. 11 Feb. 2013. "Phanerozoic Eon." Enotes.com. Enotes.com, n.d. Web. 11 Feb. 2013. "USGS: Science Topics: Phanerozoic." USGS: Science Topics: Phanerozoic. U.S. Department of the Interior, n.d. Web. 11 Feb. 2013.
19: The End