Figure 2. Cores were separated into highstand and lowstand system tracts using seismic-sequence boundaries to distinguish highstand from lowstand deposits, and texture, mineralogy (low-Mg calcite, aragonite, and quartz), and standard gamma-ray logs for placing the boundary between the lowstand and the highstand within each sequence. The transgressive system tract is included in the lowstand portion of the sequence. Note the gamma-ray peak coinciding with the quartz peak (here at Site 1003).