| TABLE 4. St. Bernard Parish, Louisiana cores - events and potential stratigraphic markers. | |||||||
| Year | Historic event | Predictive stratigraphic marker | |||||
| 1893 | Hurricane | Hurricane sediment layer and marine fossils | |||||
| 1890 | Initiation of industrial-scale bald cypress (Taxodium distichum) cutting | Decline in Taxodium distichum | |||||
| 1860's | Initiation of coal-fueled steamboats and trains | Increase in coal-based carbonaceous spherules | |||||
| 1850's | Initiation of regional railroad network | Increase in wood-based carbonaceous spherules | |||||
| 1831 | Hurricane | Hurricane sediment layer and marine fossils | |||||
| 1829 | Coal barges begin supplying sugar mills | First appearance of coal-based carbonaceous spherules | |||||
| 1814 | Beginning of steamboat activity on the Mississippi River | Appearance of wood-based carbonaceous spherules | |||||
| 1812 | Hurricane | Hurricane sediment layer and marine fossils | |||||
| 1794 | Second fire of New Orleans | Abundance of charcoal | |||||
| 1790 | Major production of sugarcane begins | Increase in Saccharum officinarum phytoliths and pollen | |||||
| 1788 | First fire of New Orleans | Abundance of charcoal | |||||
| 1751 | Introduction of sugarcane (Saccharum officinarum) | Appearance of Saccharum officinarum phytoliths and pollen | |||||
| 1731 | Peas and beans exported to the West Indies | Increase of pea and bean pollen and phytoliths | |||||
| 1722 | Two hurricanes | Hurricane sediment layers and marine fossils | |||||
| 1721 | New Orleans census records cattle and horses | Dramatic increase in Sporomiella spores | |||||
| 1720 | Introduction of rice (Oryza sativa) in region | Appearance of Oryza sativa phytoliths and pollen | |||||
| 1717 | New Orleans settled by the French | Increase in Compositae pollen | |||||
| Source: U.S. Geological Survey Open-File Report 98-36. Carbon storage and late Holocene chronostratigraphy of a Mississippi River deltaic marsh, St. Bernard Parish, Louisiana (H.W. Markewich, ed.). | |||||||