Previous   |    Close   |    Next

Figure F7. Digital image of a ~66 cm thick pinkish gray felsic tephra layer (interval 344-U1414A-8H-4A, 96 cm, to 8H-5A, 46 cm). Contacts are sharp but curved at the base because of drilling disturbance and irregular at the top (dashed line) representing small-scale reworking in the soupy transition to the background sediment. The tephra layer contains medium sand–sized ash that grades normally upward to fine silt–sized ash. Tephra components are mainly transparent glass shards, feldspar, amphibole, and biotite.

Previous   |    Close   |    Next   |    Top of page