| 31. | Here, compression does not result in appreciable mountain building, which is mostly accommodated by folding and stacking of thrusts.
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| 32. | The shale was metamorphosed into slate during the Acadian orogeny ( a mountain building period 375 million years ago ).
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| 33. | During long periods of mountain building, the shale and sandstone were slowly transformed into the schist and quartzite found today.
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| 34. | Approximately 70 to 80 million years ago, a series of mountain building events called the Laramide orogeny uplifted the entire region.
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| 35. | And remember that the interiors of the plates do not deform-spreading, subduction and mountain building happen at the boundaries between plates.
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| 36. | The later half of the period experienced glaciations, low sea level, and mountain building as the continents collided to form Pangaea.
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| 37. | The mountain building period known as the Variscan orogeny, which occurred around 280 Ma, caused major deformation in south west England.
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| 38. | This flat-slab subduction process is thought to be one of the main causes of mountain building and deformation in South America.
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| 39. | This was just the first of a series of mountain building plate collisions that contributed to the formation of the Appalachians.
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| 40. | During this time the Alpine mountain building, and much of the movement in the palaeozoic region was probably connected with it.
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