CARBON STORAGE AND LATE HOLOCENE CHRONOSTRATIGRAPHY OF A MISSISSIPPI RIVER DELTAIC MARSH, ST. BERNARD PARISH, LOUISIANA

US GEOLOGICAL SURVEY OPEN-FILE REPORT 98-36

FIGURE 19. Plots of carbon mass/area versus time (years before present) for the SB1c core, St. Bernard Parish, Louisiana. (A) arithmetic plot showing apparent difference in recent (first four data points) and long-term rates, (B) semi-log plot showing an exponential relation, and (C) log/log plot showing, that once the corrected age data become available, a decay constant can be calculated for the decomposition rates of marsh organic matter.