Figure F3. Summary stratigraphic section for the Kirkwood Formation (?lower to middle Miocene) in the Double Trouble borehole, with core recovery (Rec.), lithology (Lith.), gamma ray and resistivity log signatures, age, and environments (Env.). Syst. = systems tract. Kw1a and K1b are sequences defined by Sugarman et al. (1993). See Figure F2B for legend.