Figure F4. Kw2 sequences (lower to middle Miocene) from the Kirkwood Formation at the Ocean View borehole. Kw2a and Kw2b are sequences defined by Miller et al. (1997) and Sugarman et al. (1993). Subdivision of Sequence Kw2a into three higher-order sequences is new. uHST = upper highstand systems tract, lHST = lower highstand systems tract, MFS = maximum flooding surface, TST = transgressive systems tract, LST = lowstand systems tract. The key to lithologic symbols is given in Figure F2.