Fertilizing dust from the Sahara
It is estimated that the total thickness of sediment accumulated in the area called Great Bahama Bank (associated with Andros) exceeds 4,500 m. This limestone probably had deposited in shallow water, which would imply a rate of subsidence of the sedimentary layers of about 3.6 cm per 1000 years.
A group of geologists from the University of Miami has proposed a theory to explain the formation of the Bahamas in an article published in the renowned journal Geology . http://enjoycoloring.com/tag/cartoon/ It involves fertilization shallow in this region by dust brought by the winds waters. In this case, it is, nowadays, the dust from the Sahara.
In this picture you see on the top left and bottom Florida Cuba. The Great Bahama Bank is clearly visible amid the islands of Andros island, just above we see the Little Bahama Bank.
In this picture you see on the top left and bottom Florida Cuba. The Great Bahama Bank is clearly visible in the middle, with the islands of Andros Islands. Just above, we see the Little Bahama Bank. © NASA