Looked it up.
The Referee, at his discretion, may assess a major penalty, based on the degree of violence, to a player guilty of interfering with an opponent.
Both Cross-checking and interference are severity of the contact. Neither contact was severe. The contact with the ice was. Cut up that section, throw it in the box for 5 minutes.
56.4 Major Penalty - The Referee, at his discretion, may assess a major penalty, based on the degree of violence, to a player guilty of interfering with an opponent (see 56.5).
59.3 Major Penalty - A major penalty, at the discretion of the Referee based on the severity of the contact, shall be imposed on a player who “cross checks” an opponent (see 59.5).