Bakken crude is considered more volatile than other types of oil, which presents a safety problem when moved by rail. New regulations approved Tuesday require oil producers to separate flammable and volatile liquids prior to shipment by rail.
Dec 11, 2014 The New York Times - Energy & Environment
Crude oil may be flammable, but until recently was not thought to be explosive. However, three recent oil train explosions all involving crude oil from the Bakken formation have prodded investigators to determine why Bakken crude is more explosive.
Jan 8, 2014 The Wall Street Journal - Business
With many oil pipelines stalled due to popular opposition and/or regulatory hurdles (e.g. Keystone XL and Northern Gateway, or even refineries opting for more flexibility) there seemed to be no end to the growth in moving oil by rail...until now.
Dec 12, 2013 The Wall Street Journal - Business