Hydrocarbons have been tested or produced from the Triassic Thaynes Formation in at least four fields in the Overthrust belt. The source of these hydrocarbons has been a subject of speculation and research. Gas chromatographic analyses of Thaynes Formation hydrocarbons and pyrolitic analyses of rocks of the Thaynes Formation were done in an attempt to establish the source of hydrocarbon liquids produced from the formation in the Overthrust belt.

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