VINYL FORMAT. 180 GRAM. The high quality 180-gram vinyl version of John Vanderslice's Emerald City will make you never want to listen to a CD again. The already amazing tracks from the CD sound stunningly gorgeous on vinyl, due in large part to the mastering of renowned engineer John Golden. The album takes its title from the term used by those on the ground to refer to the "Green Zone" in Iraq, but its themes are broad.