The Parshall Oil Field is an oil field producing from a rock unit from the Late Devonian to Early Mississippian age occupying about how many sqmi?
200000
Title: Parshall Oil Field
Passage: The Parshall Oil Field is an oil field producing from the Bakken Formation and Three Forks Formation near the town of Parshall, in Mountrail County, North Dakota.  The field is in the Williston Basin.  The field was discovered in 2006 by EOG Resources, which drilled, and now operates, most of the wells.  It was the discovery of the Parshall Field that was largely responsible for the North Dakota oil boom.  Parshall’s break-even price is at US$38/barrel, which is the lowest on the Bakken Formation; overall, Bakken’s break-even point is of US$62/barrel.
Title: Bakken Formation
Passage: The Bakken Formation is a rock unit from the Late Devonian to Early Mississippian age occupying about 200000 sqmi of the subsurface of the Williston Basin, underlying parts of Montana, North Dakota, Saskatchewan and Manitoba.  The formation was initially described by geologist J.W. Nordquist in 1953.  The formation is entirely in the subsurface, and has no surface outcrop.  It is named after Henry Bakken, a farmer in Tioga, North Dakota, who owned the land where the formation was initially discovered, during drilling for oil.
Title: North Dakota oil boom
Passage: The North Dakota oil boom refers to the period of rapidly expanding oil extraction from the Bakken formation in the state of North Dakota that lasted from the discovery of Parshall Oil Field in 2006, and peaked in 2012, but with substantially less growth noted since 2015 due to a global decline in oil prices.  Despite the Great Recession, the oil boom resulted in enough jobs to provide North Dakota with the lowest unemployment rate in the United States.  The boom has given North Dakota, a state with a 2013 population of about 725,000, a billion-dollar budget surplus.  North Dakota, which ranked 38th in per capita gross domestic product (GDP) in 2001, rose steadily with the Bakken boom, and now has per capita GDP 29% above the national average.
Parshall Oil Field Bakken Formation