Fossils B/C

[EwwPhysics]

Ok! (sorry about taking so long to respond oops)

1. Compare life before and after the Cambrian Explosion

2. The Marine Mesozoic Revolution was the adaption to what type of predation? Name one example of a predator who exhibited this behavior.

3. What are microbial mats and why are they significant to the Cambrian Substrate Revolution?

1.

Click to Show Answer

Before, there were non-complex organisms. After, there were more complex organisms 

2.

Click to Show Answer

Shell-Crushing?, Crinoids

3.

Click to Show Answer

sheets made up of micro-organisms like bacteria. 

1.

Click to Show Answer

Yeah, life became much more diverse and went from mostly unicellular to become more like the animals that exist today.

2.

Click to Show Answer

Yes, shell-crushing. Crinoids were actually easy prey for these shell-crushing predators so most crinoids went extinct due to the MMR. Possible shell-crushing predators included ichthyosaurs, pliosaurs, plesiosaurs, and mosasaurs.

3.

Click to Show Answer

Yeah. They were important for the Cambrian Substrate Revolution because more animals began burrowing into these microbial mats and breaking them down which allowed water/oxygen to get much farther beneath the sea floor, making these layers habitable.

Good job, your turn!

[stlcards422]

1. Identify
2. Name time period
3.Extinct or Not?

[hmmm]

1. Identify
2. Name time period
3.Extinct or Not?

dimetrodon, permian, yes

[stlcards422]

1. Identify
2. Name time period
3.Extinct or Not?

dimetrodon, permian, yes

good, all right

[BennyTheJett]

Let's refresh this:

Screenshot 2021-01-14 at 9.17.20 AM.png (86.14 KiB) Viewed 175 times

1)Identify this to the lowest taxonomic level on the rule sheet.
2)The root words for this name mean what?
3)This specimen is most commonly preserved in rocks from what geologic time period?

[Fyren]

Click to Show Answer

1. Genus Eusthenopteron
2. Eustheno- meaning "strength" and -pteron meaning "wing", both of which are Greek.
3. Late Devonian?

[BennyTheJett]

Very good! Your turn!

[Fyren]

Sorry for taking a while, I've been kind of busy...
1. I'm a carbonate sedimentary rock that is extremely soluble to water and acid solutions and commonly used as a building material. Who am I?
2. What traits must a specimen have in order to be considered an index fossil?
3. I am a konservat lagerstätte with fossils preserved in sedimentary rocks formed during the Pennsylvanian period. Who am I and why am I important?

[DragonTownEpic]

Click to Show Answer

1. Limestone
2. Widespread distribution, short time range, easily recognizable, and abundant.
3. Mazon Creek? It's important because of the quality, quantity, and diversity of the fossils

[Fyren]

Excellent! Your turn.