Assertion: hydrocarbon's formation | /r/CreatedBy | a depth of 100 kilometers deep
Facets:
value: in the earths crust
type: LOCATION
Source sentences:
text: The National Academy of Sciences published a paper in 2002 proving that polycyclic aromatic hydrocarbons require pressures greater than 30 kilobar for their formation which corresponds to a depth of 100 kilometers deep in the earths crust.