| 21. | The study of extensional flows is called extensional rheology.
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| 22. | See for example extension, and the extensional devices.
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| 23. | Extensional basins occur in the central and east parts of the fold belt.
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| 24. | Buchan metamorphism occurs often in extensional settings, for example at rift basins.
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| 25. | Ribbons are long and narrow extensional troughs that are separated by narrow ridges.
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| 26. | Extensional tectonics were also most active during the Famennian.
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| 27. | This caused strong extensional stresses in the moon's crust leading to cracking.
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| 28. | The Rhine Graben is a major extensional basin.
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| 29. | Alba s tectonic features are almost entirely extensional, consisting of normal tension cracks.
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| 30. | Commercially available extensional rheometers have been segregated according to their applicability to viscosity ranges.
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