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Sentences with phrase «once ancient seabeds»
In Namibia, China and other spots around the world, researchers have collected rocks that were
once ancient seabeds
, and analysed the amounts of iron, molybdenum and other metals in them.
https://www.scientificamerican.com/
Porter examined fossils from the Chuar Group in the Grand Canyon —
once an ancient seabed
— that are between 782 and 742 million years old.
https://www.sciencedaily.com/
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