| 1. | Somewhere between confronting the 1991 ice barrier and publishing " Riddle,"
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| 2. | A few hours later, they reached an ice barrier, which blocked progress towards the south-east.
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| 3. | He also participated, with the scientists Great Ice Barrier.
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| 4. | During early September further attempts were made to penetrate the ice barrier to the west.
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| 5. | The plan did not gain any support as the ice barriers proved even more difficult.
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| 6. | At that point the ice barrier becomes slightly buoyant and rises a bit from its mucky foundations.
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| 7. | As the melting-and-freezing cycle continues, an ice barrier is created that grows upward, toward the roof peak.
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| 8. | The final hurdle before the summit is an ice barrier known as " death throat, " he said.
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| 9. | It was originally called "'The Barrier "', with various adjectives including "'Great Ice Barrier "', as it prevented sailing further south.
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| 10. | The ship crosses an ice barrier and arrives in open sea, close to the South Pole, albeit with a mild climate.
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