EART 3 Geology of National Parks 3304 - PowerPoint PPT Presentation

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EART 3 Geology of National Parks 3304

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EART 3 Geology of National Parks 3304 – PowerPoint PPT presentation

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Title: EART 3 Geology of National Parks 3304


1
EART 3- Geology of National Parks 3/3/04
  • OUTLINE
  • Groundwater and the Hydrologic Cycle
  • Cave Formation
  • Mammoth Caves NP and Carlsbad Caverns NP
  • CONCEPTS
  • Water- a valuable resource
  • Chemical dissolution and precipitation reactions

2
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3
Well
Spring
4
Ocean
Groundwater
Glaciers
Lakes and Rivers
Atmosphere
Biosphere
5
Impacts of Groundwater Withdrawl
  • Lowering water table
  • Compaction and aquifer reduction
  • Saltwater intrusion

6
Karst Topography- limestone dissolution by
groundwater
  • Caves
  • Sinkholes
  • Springs
  • Disappearing streams
  • Solution Valleys- linear series of sinkholes

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10
Dissolution Reactions
  • water carbon dioxide carbonic acid
  • H20 CO2 H2CO3
  • carbonic acid limestone calcium
    bicarbonate
  • H2C03 Ca CO3 Ca
    HCO3

11
Reprecipitation in Caves
  • When groundwater with dissolved Ca and 2HCO3
    seeps into an open cavity, it releases CO2 and
    forms CaCO3 as travertine which is reprecipitated
    limestone

12
Speleothems travertine deposits in caves
  • Stalactite- icicle like deposit from dripping
    water from cave ceiling
  • Stalagmite- same as above but builds from cave
    floor up
  • Flowstone- produced by flowing water over a wall

13
Stalactite
14
Stalactites and Stalagmites
15
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16
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17
Photo CD-Mammoth
18
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19
El Capitan
20
Guadalupe Peak
21
Top of El Capitan
22
H2S 2O2 2HSO4
Hydrogen sulphide oxygen sulphuric acid
23
Keyhole and Eternal Kiss
24
Queens Orchestra
25
Queens Chamber
26
Queens Chamber Draperies
27
Papoose Room
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