The Brown Skillful glacier, with his 35kms of length, 4kms of wide and 195kms/2 on the contrary that other glaciers has been advancing in which goes of the century.

The front of this glacier in year 1900 was almost to 1 km of the peninsula of Magallanes, in 1908 was to 300 mts. and in 1914. to 100 they mts.

En 1917 for the first time (and since then with increasing regularity) I form the first ice dock between the arm Rico and the Iceberg Channel, reaching mainland the Peninsula of Magallanes.

In 1947 cuando it is left to the arm Rico edicado begins to rise its water level, since the ice barrier prevents the passage of its only desague. Therefore, when the waters of the arm Rico exert sufficient hydrostatic pressure (adding the fusion by temperature difference between the lake and the ice) are forming a tunnel until the channel of Icebergs of the Argentine Lake until breaking the arcs formádose therefore a channel by which the arm Rico is drained by the Argentine Lake and this as well by the river Santa Cruz until the Atlantic Ocean.