Figure F6. A. Close-up digital photograph of nannofossil chalk with clay and dolomite (Unit III; interval 199-1217A-16X-1, 70-76 cm). The interval is heavily bioturbated. The darker bands are nannofossil claystone with dolomite with lighter bands of nannofossil chalk. B. Close-up digital photograph of dolomite rhombs collected on a 63-µm mesh sieve (interval 199-1217A-16X-2, 19-21 cm.)

Figure F6. A. Close-up digital photograph of nannofossil chalk with clay and dolomite (Unit III; interval 199-1217A-16X-1, 70-76 cm). The interval is heavily bioturbated. The darker bands are nannofossil claystone with dolomite with lighter bands of nannofossil chalk. B. Close-up digital photograph of dolomite rhombs collected on a 63-µm mesh sieve (interval 199-1217A-16X-2, 19-21 cm.)