The Corinth Canal, one of Greece’s landmarks, will remain closed to ships until Friday, the company operating the passage said yesterday as work began to clear debris from a landslide. Periandros SA said that about 5,000 cubic meters of debris fell into the canal early on Sunday. As a result, parts of the canal, which opened in 1893, are now too shallow for ships to pass through. Some 11,000 vessels sail through the canal each year. A special floating crane began clearing rocks and earth from the seabed yesterday. The depth of the canal, which is 6.3 kilometers long and about 24 meters wide, is normally about 8 meters. Officials said that landslides are known to happen in the canal because there are a number of geological fault lines in the area, which is west of Athens. A landslide in 1923, when some 41,000 cubic meters of debris fell into the canal, led to the passage being closed for two years.