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9 Cards in this Set
- Front
- Back
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Fossil
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Any remnant or evidences of past lives preserved
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Different Ways Fossils are Made
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1. Sea Level Changes
2. Evaporation caused calcium carbonate pile up 3. Periodic mudslides 4. Oil Shale--no decomposition, makes toxins in lake causing all organisms to die 5. Sticky tar, things get stuck |
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What Makes a Good Fossil
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Things with hard parts
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What's Represented in Fossils
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Plants, bones, shells, anything hard, exoskeleton
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What Can You Learn
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How they ate, body parts, what they at, predator or prey, schematic of ecosystem, migration patterns, community behaviors, running speed (foot prints)
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Types of Fossils
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1. Fly in Amber- animal is stuck in pine resin, can still extract DNA from it, still has soft tissue and organisms
2. Trace patterns: remnants of marks- footprints 3. Fossilized Hard parts 4. Shit |
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Gaps in Fossil Record
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Things have to be just right to be preserved, if something evolves quickly, you may miss intermediate forms
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Stromatolites
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Layers of microorganisms and sediment
Makes layers on layers and creates fossils |
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Why Some Lineages Have Make More Species
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Available unexploited nitches are more available for certain speeches
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