| 11. | Tunnel valleys frequently include relatively straight individual segments parallel to and independent of one another.
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| 12. | Tunnel valleys fill in two main ways.
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| 13. | Vejle River Valley and Vejle Fjord together form the longest tunnel valley in eastern Jutland.
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| 14. | Tunnel valleys play a useful role in identifying oil rich areas in Arabia and North Africa.
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| 15. | Hence the presence of tunnel valleys is an indicator of the presence of oil in these areas.
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| 16. | Tunnel valleys are likely to fill with sediment as the result of meltwater release during glacial recession.
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| 17. | In the first instance, debris carried by flow settles out and accumulates in the tunnel valley.
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| 18. | The tunnel valley sedimentary record is controlled by meltwater release flowrates and sediment burdens during glacial recession.
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| 19. | Tunnel valleys are often buried or partially buried by sediment accumulation during periods of ice advance and retreat.
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| 20. | Tunnel valleys may remain open, partially filled or filled, as a function of the glacial recession.
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