Sea-level rise once separated Crete’s Mochlos islet from the mainland, researchers say

A small rocky islet off the coastal village of Mochlos in eastern Crete, home to one of the region’s most significant archaeological sites, was once physically connected to the Cretan mainland by a narrow strip of land, according to research cited by the Mochlos Archaeological Project.

Today the islet sits just a few metres from shore and appears to visitors as though it has always been separate from Crete. During the Bronze Age, however, it formed the tip of a small peninsula, with the surrounding coastline creating sheltered points for ships.

Traces of the land bridge remain underwater

The outline of the former land strip has not disappeared entirely. According to the Mochlos Archaeological Project, the contour of the old connection can still be made out beneath the sea surface. During the Bronze Age, this strip linked the settlement on what is now the islet to the plain on the opposite Cretan coast.

The site was therefore not simply an archaeological location near the coast, but part of a coastal landscape quite different from the one visible today.

Rising sea levels, not a single event

Research does not point to a single catastrophic event that abruptly cut the land connection. Studies cited by the Penn Museum instead point to a gradual change in relative sea level along Crete’s eastern coast.

According to those studies, sea level in this section of the Cretan coastline has risen by roughly 1 to 1.5 metres since the Roman period. The low, narrow strip of land joining Mochlos to Crete gradually became submerged, and over the centuries the former peninsula turned into the small island seen today.

A strategic point with two natural harbours

While still connected to the opposite shore, Mochlos benefited from a geographic advantage: the narrow land strip provided shelter from winds and allowed for natural anchorages. This is cited as one of the reasons Mochlos developed into an important port and trading centre during the Minoan period.

Excavations by the INSTAP Study Center for East Crete have uncovered houses, streets, workshops, tombs and artifacts pointing to an active community. Finds at the site include evidence of gold jewelry production, stone vessels and obsidian blades, along with signs of trade contacts extending well beyond Crete.

A settlement that spanned both shores

Archaeologists have established that the ancient settlement was not confined to the present-day islet. During the Neopalatial period, buildings stood both on what is now Mochlos and on the opposite Cretan coast, connected by the narrow land bridge.

For the people living there thousands of years ago, there was no sea crossing of the kind visible today — Mochlos formed part of the same landmass as the rest of Crete.

Submerged remains still visible today

The sea between the present-day islet and the coast is shallow in several spots. Submerged archaeological remains have been identified in the area, with parts of the ancient topography now lying underwater, including ancient roads and structures near the shoreline that have been affected by the change in sea level.

Part of Mochlos’s history is therefore found neither on the islet nor on the opposite coast alone, but between the two, on the seabed. Anyone researching places in Crete with a layered archaeological history will find Mochlos among the more striking examples, alongside other Bronze Age sites such as the Linear A inscription found at Mount Juktas.

Today’s visitor sees a small island a short distance from the coast of eastern Crete. A Minoan-era inhabitant, by contrast, would have seen a narrow peninsula, two sheltered anchorages, houses and workshops, ships arriving and departing, and a settlement directly linked to the rest of Crete. It took centuries of gradual natural change for that picture to become the islet seen today.