Figure F20. Three differently colored carbonate cements in dark greenish gray clay in lithostratigraphic Unit III (interval 311-U1328C-19X-4, 16–39 cm). A smear slide sample was taken from the brownish unlithified carbonate cement (interval 311-U1328C-19X-4, 18–20 cm; labeled "Carbonate"). At the bottom of the light colored unlithified carbonate cement (interval 311-U1328C-19X-4, 22–25 cm; labeled "HMC + Ca-dolomite"), a partly lithified carbonate piece is present in the working half. Right below, there is a dark gray sand layer (interval 311-U1328C-19X-4, 25–29 cm). Within the crumbly looking interval underneath the sand layer (interval 311-U1328C-19X-4, 29–34 cm; labeled "HMC + Ca-dolomite"), a piece of lithified dark gray carbonate was found in the working half, which completely filled the width of the core, suggesting a more extensive layer of carbonate.
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