small glacial stream from a melting glacier in alaska

water ice winter rock reflection snow geology freezing formation nature river tree sea stream wave terrain rapid frost calving chunks break terminus glacier breaks forward motion unstable call aicebergs icebergs bay alaska landscape blue cold iceberg white travel environment ocean warming frozen scenic glacial climate melting global change splash natural mountain icy melt alaskan mountains scenery outdoor environmental america collapse alaskafrom streams commonly referred meltwater movement influenced directed gravity forms types supraglacial englacial subglacial proglacial small