The trade relations of this culture spread far and wide from the Greek mainland to Crete and Asia Minor.
Colin Renfrew has proposed an Early Cycladic subdivision into Grotta-Pelos, Keros-Syros, Kastri, and Phylakopi I periods.
Keros-Syros culture is well represented by numerous cemeteries on Amorgos (notably Dokathismata) and Naxos (Aplomata, Spedos).
Some of the important artifacts of this culture are the so-called "Frying pans" – shallow circular vessels or bowls with a decorated base.
They range from the Greek mainland to Crete, where the Cycladic figurines were exported, and imitated by the local artists.