| 41. | It is becoming especially vulnerable as huge ice streams that feed it from West Antarctica begin to slow or have stopped,
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| 42. | The ice stream is situated in a deep trough which is a tectonic feature between the Ellsworth Mountains and the Fletcher Promontory.
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| 43. | Scientists collected data on the glacier's ice stream, and deployed six automatic weather stations to relay information back to Australia every hour.
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| 44. | This web of tributaries forms a transition zone between the sluggish inland ice and the swiftly moving ice streams closer to the margins.
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| 45. | The speed of an ice stream can be over 1, 000 metres per year, an order of magnitude faster than the surrounding ice.
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| 46. | The lake is located under the Whillans Ice Stream at the southeastern edge of the Ross Ice Shelf in the west of the continent.
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| 47. | During the last ice age, the B�rgenstock was completely covered by an ice stream flowing from the Gotthard into the foothills of the Alps.
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| 48. | "It is becoming especially vulnerable as huge ice streams that feed it from West Antarctica begin to slow or have stopped, " he said.
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| 49. | During the last ice age, there was a connected ice stream of glaciers between Kangchenjunga in the east and Nanga Parbat in the west.
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| 50. | At the upper ( inland ) end of the ice stream the ice thickness reaches 3100 m falling to around 2300 m in the trough.
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