Fossils B/C

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hmmm
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Re: Fossils B/C

Post by hmmm » April 21st, 2019, 6:37 am

dchen22 wrote:
hmmm wrote:
1.Where is the Burgess Shale?
2.Name and describe the event that the Burgess Shale shows?
3.What famous fossil was found at Solnhofen?
4.Why is that fossil important?
5.Why is Ghost Ranch important?
6.These locations are all ______
1. Yoho National Park and Kootenay National Park (Canadian Rockies), British Columbia, Canada
2. Cambrian explosion was a rapid biodiversification event in the Cambrian that led to the modern animal phyla as well as the first appearance of predation.
3. Archaeopteryx 
4. It’s a transitional fossil between reptiles and birds.
5. Lagerstätten
You didn't answer #5(concentration of coelophysis)but the rest are right
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Re: Fossils B/C

Post by dchen22 » April 21st, 2019, 10:49 am

Oops
What is an aragonite sea? What is the threshold for an aragonite sea? What conditions are aragonite seas associated with and when was the most recent aragonite sea?
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Re: Fossils B/C

Post by wec01 » April 21st, 2019, 12:04 pm

dchen22 wrote:Oops
What is an aragonite sea? What is the threshold for an aragonite sea? What conditions are aragonite seas associated with and when was the most recent aragonite sea?
An aragonite sea is when calcium carbonate primarily takes the form of aragonite or high magnesium calcite. The threshold for this to happen, is a ratio of Mg to Ca higher than 2. Aragonite is generally associated with cooler seas and the most recent aragonite sea started during the Cenozoic and is ongoing.
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4th place Fossils
5th place Sounds of Music
2nd place Thermodynamics

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Re: Fossils B/C

Post by dchen22 » April 21st, 2019, 1:54 pm

wec01 wrote:
dchen22 wrote:Oops
What is an aragonite sea? What is the threshold for an aragonite sea? What conditions are aragonite seas associated with and when was the most recent aragonite sea?
An aragonite sea is when calcium carbonate primarily takes the form of aragonite or high magnesium calcite. The threshold for this to happen, is a ratio of Mg to Ca higher than 2. Aragonite is generally associated with cooler seas and the most recent aragonite sea started during the Cenozoic and is ongoing.
Yep! Aragonite seas are also associated with decreased sea floor spreading.
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Re: Fossils B/C

Post by karanbe123 » April 21st, 2019, 2:01 pm

dchen22 wrote:
wec01 wrote:
dchen22 wrote:Oops
What is an aragonite sea? What is the threshold for an aragonite sea? What conditions are aragonite seas associated with and when was the most recent aragonite sea?
An aragonite sea is when calcium carbonate primarily takes the form of aragonite or high magnesium calcite. The threshold for this to happen, is a ratio of Mg to Ca higher than 2. Aragonite is generally associated with cooler seas and the most recent aragonite sea started during the Cenozoic and is ongoing.
Yep! Aragonite seas are also associated with decreased sea floor spreading.
And low CO2 levels.
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Re: Fossils B/C

Post by wec01 » April 21st, 2019, 2:47 pm

How do foraminifera affect the carbon cycle? Where does the carbon go after the foraminifera die? Through what process is the carbon then released again?
2019 Division C Nationals Medals:
4th place Fossils
5th place Sounds of Music
2nd place Thermodynamics

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Re: Fossils B/C

Post by karanbe123 » April 21st, 2019, 3:35 pm

wec01 wrote:How do foraminifera affect the carbon cycle? Where does the carbon go after the foraminifera die? Through what process is the carbon then released again?
1) Helps balance the carbon cycle in the ocean by neutralizing the acidity due to their shells which are composed of calcite. 2) Once the calcified foraminifera reach the ocean floor, layers of shells and sediment are cemented together and turn to rock, storing the carbon in rocks such as limestone. 3) Rocks formed may become exposed (due to tectonic processes or changes in sea level) to the atmosphere and to the weathering of rain. Due to this exposure to rain/water, carbon may be released from the rocks.(Not sure if this is what you were looking for or if there is a specific name for this process - maybe just chemical weathering?).
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Re: Fossils B/C

Post by wec01 » April 21st, 2019, 5:59 pm

karanbe123 wrote:
wec01 wrote:How do foraminifera affect the carbon cycle? Where does the carbon go after the foraminifera die? Through what process is the carbon then released again?
1) Helps balance the carbon cycle in the ocean by neutralizing the acidity due to their shells which are composed of calcite. 2) Once the calcified foraminifera reach the ocean floor, layers of shells and sediment are cemented together and turn to rock, storing the carbon in rocks such as limestone. 3) Rocks formed may become exposed (due to tectonic processes or changes in sea level) to the atmosphere and to the weathering of rain. Due to this exposure to rain/water, carbon may be released from the rocks.(Not sure if this is what you were looking for or if there is a specific name for this process - maybe just chemical weathering?).
Looks good (and yeah, I was just looking for weathering for the third question)
Your turn
2019 Division C Nationals Medals:
4th place Fossils
5th place Sounds of Music
2nd place Thermodynamics

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