Chap. 1  Karst development and speleogenesis

Chap. 1 Karst development and speleogenesis PowerPoint PPT Presentation


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Introduction: the initial conditions. Progressive permeability / porous aquifers5 conditions:Soluble and fissured rock (limestone?)Water (solvent, transport)Acidity (CO2 from vegetation)Hydraulic headand time?Large karst development in:Wet regions (rain vegetation)Mountains (topographic

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Chap. 1 Karst development and speleogenesis

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2. Introduction: the initial conditions Progressive permeability / porous aquifers 5 conditions: Soluble and fissured rock (limestone…) Water (solvent, transport) Acidity (CO2 from vegetation) Hydraulic head and time… Large karst development in: Wet regions (rain + vegetation) Mountains (topographic gradient) / plateau (long evolution)

3. Karst development and speleogenesis 1 – An organized aquifer 2 – An evolutive dynamic 3 – Vertical cave pattern

4. An organized aquifer 1.1. Karst inception

5. An organized aquifer 1.2. Vertical organization

6. An organized aquifer 1.2. Vertical organization

7. An organized aquifer 1.3. Perched vs. dammed karst

8. 2. An evolutive dynamic 2.1. Information from recession curves

9. 2. An evolutive dynamic 2.2. Exchanges: drain ? annex systems

10. 2. An evolutive dynamic 2.3. Karst aquifers classification [after Mangin]

11. 3. Vertical cave pattern 3.1. Main types of vertical cave pattern

12. 3. Vertical cave pattern 3.1. Main types of vertical cave pattern

13. 3. Vertical cave pattern 3.1. Main types of vertical cave pattern

14. 3. Vertical cave pattern 3.1. Main types of vertical cave pattern

15. 3. Vertical cave pattern 3.1. Main types of vertical cave pattern

16. 3. Vertical cave pattern 3.2. Influence of base level changes

17. 3. Vertical cave pattern 3.2. Influence of base level changes (lowering)

18. 3. Vertical cave pattern 3.2. Influence of base level changes (rising)

19. 3. Vertical cave pattern 3.2. Influence of base level changes (rising)

20. 3. Vertical cave pattern 3.2. Influence of base level changes (rising)

21. Conclusion

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