The Azure Window was made of a Maltese limestone known as Globigerina Limestone which is the second oldest rock found on the islands covering almost 70% of its area.
The Azure Window was made of a Maltese limestone. This Maltese limestone was known as Globigerina Limestone. This Globigerina Limestone is the second oldest rock. This second oldest rock is found on the islands. These islands are covering almost 70% of its area.