UWEC GEOL 102 - Fossils (2 pages)

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GEOL 102 1st Edition Lecture 3 Outline of Last Lecture I Origin of the Earth and Geologic time A Used to understand the difference between relative and absolute geologic time B Geologic scale C Used to understand what rocks tell us about the age of the earth II Devils Lake A Quartzite formation hypothesis a Loose grains of sand deposited by running water then something happened to turn it into the hard rock we see today III Disposition A Particles set down by some sort of current a In ex After a flood B When running water is at work it tends to deposit things in a layer a Layer will be sub horizontal IV Erosion A Opposite of deposition B Pick up and move V Ripple Marks A Associated with grains moving from current VI Metamorphic rock A change Shape B Under high temperature and pressure C Recrystallization no melt Outline of Current Lecture II Fossils These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute A Any evidence for a previous life form III Sandstone A Is from the sedimentary rock family B Pieces put together VII Things that could have moved the mountains at devils lake A Glaciers a Would cause striations i Scratches on the rocks b Would cause various types and sizes of rocks to be placed B Rivers a Would have to look for ripplemarks sediment that doesn t belong river fossils or rounded rocks C Earthquakes a Would look for jagged line find tops elsewhere fault line D Volcano a Lava flows volcanic rock beds of lava flows jagged pieces of rock volcanic ash