Gap Fill - Dinosaurs - Level 6


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   account      aftermath      ago      animal      asteroid      crater      deep      details      each      geology      impact      layers      massive      mayhem      process      reaction      ready      rock      seabed      tidal  
Scientists say they have unearthed of how the dinosaurs were wiped out 65 million years . A team of geophysicists is analyzing formations in a crater under the off Mexico. The rocks contain the remnants of the cataclysmic of a gigantic asteroid impacting with Earth. The scientists say the of rock they have extracted reveal a step-by-step of the destruction that happened after the impact as rock and sediment settled on top of other in revealing layers. Geophysicist Jay Melosh from Purdue University said: "It tells us what went on inside the on that day of doom that killed the dinosaurs. All of this is directly recorded in the core."

Scientists say the was around three to four kilometers wide. It smashed into the ocean and created a hole 160kms wide and 20kms . This triggered a chain of earthquakes, tsunami, icecap melting, landslides and fires that forever changed the and life forms on Earth, killing off the dinosaurs. The asteroid's hurled out rock and minerals and created a crater. Molten rock fell back into the crater, which was then filled with ocean water from waves. This water was full of soil, vegetation, life and other debris, all of which settled in layers for scientists to analyze millions of years later. The scientists say this layer-forming took just a few hours.

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