Professor Nick Cutter (![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
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fandomhigh2022-10-27 07:58 pm
itsananomaly) wrote in fandomhigh2022-10-27 07:58 pm
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Intro to Palaeontology - Thursday, 1st Period
“This week we’re going to start looking at extinction events,” Cutter began that weeks lesson as he handed out that week’s set of notes , “a mass extinction event is an event where there is significant loss of Earth’s living species over a short period of geographical time,” he explained, “there have been five mass extinction events that have occurred and these are the Ordervician - Silurian Extinction, the Devonian Mass Extinction, the Permian-Triassic Extinction, the Triassic-Jurassic extol and the Cretaceous-Tertiary Extinction,”
“We’re going to begin to cover the first two mass extinctions today, so the first one we’re covering is the Ordervician - Silurian Extinction Event,” he continued, “this is the first mass extinction event that took place during the Hirnantian Age roughly 445 to 443 million years ago in the Odervician Period and the Rhuddanian Age of the Silurian Period from roughly 443 to 440 million years ago,”
“The Ordovician Period is noted for significant changes regarding Plate Tectonics, Biological and Climate systems,” he went on, “and it also saw some of the most diverse appearance of marine life and the first plants began to appear on and this mass extinction is the second largest in Earth’s history, wiping out nearly 85% of all species at the time” he paused, “you may recall a few weeks ago, I mentioned that the largest mass extinction was at the end of the Permian Period and we will be looking at this in the next lecture,”
“The second mass extinction we’ll be looking at is the Devonian Mass Extinction Events and there were three specific extinction events in this time, each one occurring every ten million years,” he added, “this occurred roughly 419 to 359 million years ago and while there was catastrophic loss of life through these different events, it is estimated that up to 70 to 80 percent of animal life that were living in this time were lost and in particular marine life was the hardest hit in this extinction event,”
“For the next class I would like you to prepare a report on one of these extinction events, looking at the causes of what happened and the impact that they had in shaping the planet as we know today,”
“We’re going to begin to cover the first two mass extinctions today, so the first one we’re covering is the Ordervician - Silurian Extinction Event,” he continued, “this is the first mass extinction event that took place during the Hirnantian Age roughly 445 to 443 million years ago in the Odervician Period and the Rhuddanian Age of the Silurian Period from roughly 443 to 440 million years ago,”
“The Ordovician Period is noted for significant changes regarding Plate Tectonics, Biological and Climate systems,” he went on, “and it also saw some of the most diverse appearance of marine life and the first plants began to appear on and this mass extinction is the second largest in Earth’s history, wiping out nearly 85% of all species at the time” he paused, “you may recall a few weeks ago, I mentioned that the largest mass extinction was at the end of the Permian Period and we will be looking at this in the next lecture,”
“The second mass extinction we’ll be looking at is the Devonian Mass Extinction Events and there were three specific extinction events in this time, each one occurring every ten million years,” he added, “this occurred roughly 419 to 359 million years ago and while there was catastrophic loss of life through these different events, it is estimated that up to 70 to 80 percent of animal life that were living in this time were lost and in particular marine life was the hardest hit in this extinction event,”
“For the next class I would like you to prepare a report on one of these extinction events, looking at the causes of what happened and the impact that they had in shaping the planet as we know today,”
Re: During the Lecture