A sharp-eyed oil-field worker noticed something odd about the rocks where he was clearing away soil in advance of construction. He stopped his digging machine. pictures were taken and sent to the Royal Tyrrell Museum. They sent an expert who identified the fossil as an ankylosaurus. It’s about 40 million years older than most Alberta dinosaurs, It might be the oldest, most complete fossil ever found in Alberta: 113 MYO perfect, 3-D Ankylosaurus!
UPDATE: You can read more about the find at Everything Dinosaur.