Study Dust from Sahara Helped Form Bahama Islands

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In a groundbreaking study led by marine geologist Peter Swart at the University of Miami, researchers have unveiled a surprising connection between the Sahara Desert and the formation of the Bahama Islands. The study reveals that the iron-rich dust, traversing a staggering 8,000 kilometers across the Atlantic, has played a pivotal role in shaping the geological landscape over the past 100 million years.

Cyanobacteria, identified as key contributors, thrived in the presence of this iron-rich dust, particularly due to their heightened need for iron in nitrogen fixation. The researchers discovered compelling evidence of this connection by identifying high concentrations of two trace elements characteristic of Sahara's sand in sediment samples from the sea floor along the Great Bahama Bank. This intricate process has been instrumental in the development of calcium carbonate, contributing significantly to the formation and evolution of the Bahama Islands.


1- Who led the groundbreaking study mentioned in the text?

2- What is the intricate process discussed in the text?

3- What did the researchers identify in sediment samples from the sea floor along the Great Bahama Bank?


You have completed the comprehension questions. 

Parts of this lesson are based on: An article Voice of America..