Figure 11. Close-up photograph of the dolomite horizon in the upper portion of the sequence of laminated sediments in Section 175-1078-15X-2. Note the erosive, lower contact of the 5-mm-thick coarse silt layer with the underlying laminae and the preserved burrow in the upper right. Cross-cutting relations indicate that bioturbation of the upper portion of the package of laminated sediments predated its cementation by authigenic dolomite.

Figure 11. Close-up photograph of the dolomite horizon in the upper portion of the sequence of laminated sediments in Section 175-1078-15X-2. Note the erosive, lower contact of the 5-mm-thick coarse silt layer with the underlying laminae and the preserved burrow in the upper right. Cross-cutting relations indicate that bioturbation of the upper portion of the package of laminated sediments predated its cementation by authigenic dolomite.