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fandomhigh2006-01-18 02:10 am
dr-tommy.livejournal.com) wrote in fandomhigh2006-01-18 02:10 am
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Paleontology, Jan 18th (7th period)
"Sadly, today is going to be another boring lecture day," Tommy says, an apologetic look on his face as he gives everyone a handout. "We’re going to talk about the Geologic Time Scale today. Unfortunately? This only applies to Earth’s fossil record.
There are two ways of measuring geologic time:
Relative time (chronostratic)- subdivisions of the Earth's geology in a specific order based upon relative age relationships- most commonly, vertical/stratigraphic position. These subdivisions are given names, most of which can be recognized globally, usually on the basis of fossils.
Absolute time (chronometric)- numerical ages in "millions of years" or some other measurement. These are most commonly obtained via radiometric dating methods performed on appropriate rock types.
On the handout, you’ll see that relative time is divided first into eons, which are further divided into several eras, which in turn are composed of periods, which are composed of epochs."
After giving the lecture, Tommy looks around the classroom, hoping no one's fallen asleep. "Today's discussion questions... what period would you most likely find fossils of mammals? Or dinosaurs? What kind of fossils were found in the earliest periods?"
"For your homework, I’m assigning you each a period on the geologic time scale. I’d like you to find a picture of a fossil from that time period, and hand that in along with a short description of what it is that you found. And, once again, anyone who wants to present on Monday is welcome to do so."
1. Janet Fraiser - Neogene
2. Molly Hayes - Cretaceous
3. Rory Gilmore - Permian
4. Charlie Kawalsky - Triassic
5. Yuffie Kisaragi - Jurassic
6. Rose Tyler - Paleogene
7. Sharon Valerii - Carboniferous
There are two ways of measuring geologic time:
Relative time (chronostratic)- subdivisions of the Earth's geology in a specific order based upon relative age relationships- most commonly, vertical/stratigraphic position. These subdivisions are given names, most of which can be recognized globally, usually on the basis of fossils.
Absolute time (chronometric)- numerical ages in "millions of years" or some other measurement. These are most commonly obtained via radiometric dating methods performed on appropriate rock types.
On the handout, you’ll see that relative time is divided first into eons, which are further divided into several eras, which in turn are composed of periods, which are composed of epochs."
After giving the lecture, Tommy looks around the classroom, hoping no one's fallen asleep. "Today's discussion questions... what period would you most likely find fossils of mammals? Or dinosaurs? What kind of fossils were found in the earliest periods?"
"For your homework, I’m assigning you each a period on the geologic time scale. I’d like you to find a picture of a fossil from that time period, and hand that in along with a short description of what it is that you found. And, once again, anyone who wants to present on Monday is welcome to do so."
1. Janet Fraiser - Neogene
2. Molly Hayes - Cretaceous
3. Rory Gilmore - Permian
4. Charlie Kawalsky - Triassic
5. Yuffie Kisaragi - Jurassic
6. Rose Tyler - Paleogene
7. Sharon Valerii - Carboniferous
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