3 adjectives to describe skims

As he pulled back, he ascertained that ice was fast making; and the boat actually cut its way through a thin skim, ere it reached the vessel.

We all, I think, regret that being so near we were not among the fortunate ones who saw that little flat shape skim landward out of the blue; surely they have an enviable memory; and then we fell talking and disputing about what that swift arrival may signify.

Sometimes a lonely curlew skims across The seething torment of the dread abyss, And, shrieking, dips into the mist beyond; But, solitary and unchanged for aye, He towers amid the rude revolt of waves, His stony face seamed by a thousand years, And wrinkled with a million furrows, worn By the slow drip of briny tears, that creep Along his hollow cheek.

3 adjectives to describe  skims