The story
Named for the discovery of petroleum, or oil.
Etymology from Wiktionary, CC BY-SA 4.0.
Petroleum County
Today it means: One of 56 counties in Montana, United States. County seat: Winnett. Full definition →
Today it means: One of 56 counties in Montana, United States. County seat: Winnett. Full definition →
Named for the discovery of petroleum, or oil.
Etymology from Wiktionary, CC BY-SA 4.0.