Sea-Ice Limit (image) Wiley Share Print E-Mail Caption The average sea-ice limit for April 1979-2013 (dotted), a typical Newfoundland maximum sea-ice limit for the early twentieth century (dashed and denoted as 1912) and the maximum iceberg limit for 1900-2000 are shown, in addition to the 48°N line. The location of the Titanic collision is shown by an "X". The blue shading shows depth, with the lightest blue denoting the continental shelf (< 1000 m depth). Credit Significance (journal) Usage Restrictions Credit Significance (journal) Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.