If You live on the east coast this is very common and lots of people get injured every year from black ice. Don't think it does not happen out on the west coast it does,black ice can happen even at the big mountains if conditions are right for black ice. So what do You do keep your eyes on changing conditions at all times. When you spot Ice call it to the riders behind You then if there is no time to go around You have to ride it out go on the ice look where you want the board to go in this case it straight no turns until that board hit turnable base also Known a snow. Turning On ice can put You out of the game for a while if not for good.
PS ride safe and in control at all times enjoy what the mountain has to offer.