Bluesky sandstones and shales occupy a transitional stratigraphic position between coastal plain sediments of the underlying Gething Formation and open marine shales of the Wilrich Member. The sedimentology and ichnology indicate that the Bluesky Formation in the Karr area consists of three subdivisions. The lower Bluesky preserves a disconformable ravinement surface formed by the initial transgression of the Moosebar sea over Gething coastal plain sediments. The middle Bluesky preserves shoreface to backshore facies within a high energy, northwest trending strand-plain that prograded into the Karr area from the west due to increased sediment supply. The upper Bluesky consists of a second disconformable ravinement surface, formed by renewed transgression as sediment supply diminished, overlain by shallow shelf sandstones and shales. A third transgressive ravinement surface occurs at the contact between upper Bluesky shallow shelf deposits and the Wilrich Member marine shale.