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Figure 10. Map of depositional systems of upper Bossier Formation (SB-2 to SB-3), East Texas Basin, Texas (after Ewing, 2001, Figure 3). Orange (sandy deltaic or fluvial), yellow (sand-rich shorelines), light blue (carbonate ramps), gray (basinal shales), olive (submarine fan sands), light blue green line (updip limit of Jurassic).