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14 Cards in this Set
- Front
- Back
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What are the different types of fossilized materials?
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Specimans in amber trees (fossil tree resin)
Permafrost (frozen ground) Dry caves (holds remains of organisms) Preserved in rock sediments Trace fossils (footprints in burrows & poop) |
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How are rocks in fossils preserved?
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Calcium in bone tissue is mineralized
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What is relative dating; what is absolute dating?
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Relative-> Younger sediments are layered on top of older sediments
Absolute-> Putting actual # time (based on isotopes) |
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What is the Cambrian Explosion? When did it occur?
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The rapid diversification of animal body types that began 543mya during ??
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What is a mass extinction? How many are there in the paleontolgical record?
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Rapid extinction of an unusually large # of diverse evolutionary groups across a wide geographic area/may occur due to sudden extradonery environmental changes
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What is the sixth mass extinction?
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Chessie Terry is such a FAGGGGGG!!! :X
Present day extinction humans are facing today (huge) |
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What are some of the putative causes for the Permian mass extinction? When did it occur? What percentage of species went extinct?
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1> Pangea
2> Climate function 3> Massive volcanic eruptions 4> NO mixing of oceans (reduce in O2) Occured 290-250 mya 96% of all marine species |
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When was the KT mass extinction?
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Asteroid struck the earth & caused widespread destruction
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What is the evidence that points to an asteriod strike as the trigger fo the KT extinction?
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1> iridium
2> shocked quartz 3> microtektites 4>crater found in Yucatan peninsula |
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Timing & general characteristics of Paleozoic
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Paleozoic- origin and early diversification of animals, land plants & fungi 543 mya-250 mya
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Timing & general characteristics of Pre-Cambrian
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4.6 billion-> 543 mya origin of life, photosynthesis, and oxygen atmosphere
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Timing & general characteristics of Mesozoic
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250 mya-65mya "Age of reptiles"
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Timing & general characteristics of Cenozoic
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65 mya->present "Age of mammals"
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Timing & general characteristics of Cambrian
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570 – 515 MYA; 3 major fossil assemblages
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