lsumns geology activities, part 2
DESCRIPTION
Students will gain an understanding of where minerals come from and the environmental impact of mining.TRANSCRIPT
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An LSU Museum of Natural Science presentation to accompany the activity
Louisiana Rocks and Louisiana Rocks and MineralsMinerals
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Mining Calculations
3. Record the value of your minerals ($1000 for every gram in the cup): $____
Total profit = #3 – (#1 + #2)Value of Minerals $_____ - Total Cost $_____
= Total Profit $_______
1. Total mining and processing fee ($100 per every five minutes): $_____2. Land damage: # of broken cookie pieces X $100 = $_____Total cost = #1 + #2Total Land Damage + Chip Mine Fee: $______
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Objective: Students will gain an understanding of where minerals come from and the environmental impact of mining.
Materials
For teacher: Stop watch, scale, bucket of pennies
For student: 4 chocolate cookies, toothpicks, pencil, data recording sheet, small weigh boat
Mining for MMM…MineralsMining for MMM…Minerals
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Mining rules
1. Your mine will earn $1000 for every gram of chips mined.
2. You will be charged $100 for every 5 minutes of mining.
3. You will be fined $100 for each piece of cookie that breaks off. The more damage, the more you lose.
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Investigating the layer- cake earth
What is stratigraphy?
Study of sediment layers and the relationship between rocks and fossils with time.
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Rules of StratigraphyRules of Stratigraphy
• Steno’s Principle of SuperpositionLower layers are older than higher layers
• Original HorizontalityLayers are deposited in (near-) horizontal manner
• Principle of Lateral continuityLayers extend laterally in all direction
• Cross-Cutting RelationshipsLayers intruded by other rocks are older than
the intruding rocks
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Unconformities-represents a gap in deposition – lost time!
• Nonconformity• Angular• Disconformity
Sediment layers are LostSediment layers are Lost…..…..
http://epod.usra.edu/archive/images/uncoformitysm.jpg
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……..And Moved..And Moved
Faults - Surfaces where rocks have fractured and been displaced (move relative to one another).
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Rules apply across Space and Time!Rules apply across Space and Time!
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Given the diagram, list the order (oldest to youngest) in which the following events happened:
A. Faulting B. Tilting E. IntrusionC. Erosion D. Deposition
Classroom assessment activity
Deposition 1Deposition 1
Tilting
Tilt
ing
Deposition 2 Deposition 2
IntrusionErosion
Faulting
1. Deposition 1 2. Tilting 3. Erosion4. Deposition 2 5. Intrusion 6. Faulting
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Illustration of example cake set-up. Note different cake layers (different colors) and
fault.