what is a tombolo
A tombolo is a sandbar that connects the mainland to an island, forming a permanent or temporary isthmus, and the island can be known as a tied island. Tombolos form from sand or sediment pushed along a shoreline.es. An isthmus can exist between two large landforms or between an island and a larger landform or continent. It is any narrow connecting neck of land. A tombolo is a sandbar â¦ that connects the mainland to an island, forming a permanent or temporary isthmus, and the island can be known as a tied island.