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地理漫步·世界地理英语30篇(7)

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Coastal Cliffs Show Layers of Earth’s Past

Coastal Cliffs Show Layers of Earth’s Past

海岸悬崖:地球历史的层状档案

  1. Coastal cliffs expose stacked layers of rock and sand.
  2. Each layer tells about past oceans, deserts, or forests.
  3. Fossils in cliffs reveal ancient plants and sea animals.
  4. Wave erosion constantly reshapes cliff faces and reveals new layers.
  5. Hard rock forms tall, steep cliffs; soft rock erodes faster.
  6. Cliff color changes with mineral content and age.
  7. Sea level rise makes cliffs retreat inland more quickly.
  8. Scientists study cliffs to understand climate and land change.
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