An association of benthic foraminifera and gypsum in Holocene sediments of estuarine Chesapeake Bay, USA
Bibliographic Data
| ID | 12265011 |
|---|---|
| Authors | J H Cann (University of South Australia, corresponding author), John Cann (University of South Australia), Thomas M Cronin (0000-0002-2643-0979, United States Geological Survey), Thomas Cronin (0000-0001-9522-3992, US Geological Survey, Reston, VA 20192, USA) |
| Year | 2004 |
| Volume | 14 |
| Issue | 4 |
| Pages | 614-620 |
| Publication date | 2004-05-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | The Holocene (JOURNAL) |
| Journal identifiers | ISSN: 0959-6836 • E-ISSN: 1477-0911 |
| Publisher | SAGE Publishing (PUBLISHER • US) |
| DOI | 10.1191/0959683604hl738rr |
| OpenAlex | W2118975690 |
| Language | EN |
| References cited | 15 |
Two cores of Holocene sediments recovered from the Cape Charles Channel of Chesapeake Bay yielded radiocarbon ages of about 6.8 to 5.8 ka for the lower intervals. Fossil foraminifera preserved in these lower sediments are dominated by species of Elphidium, which make up about 90% of the assemblage throughout, and probably signify deposition in hypersaline waters. Buccella frigida and Ammonia beccarii are the only other species commonly present. Hypersalinity of bottom waters seems to have been maitained by water-density stratification in a basin-like section of the channel. In core PTXT-4-P-1 transition to modem Chesapeake conditions, in which numbers of Ammonia beccarii exceed those of Elphidium, comenced about 400 years ago. In core PTXT-3-P-2 hypersalinity is further signified by the presence of abundant euhedral crystals of gypsum in association with the fossil Elphidium. This occurrence of gypsum is not attributed to palaeoclimatic aridity, but rather to inflow of groundwater from adjacent gypsiferous Miocene strata. The study shows that in palaeoclimatic investigations the significance of the presence of gysum should be evaluated with caution - it does not necessarily signify an evaporative regime
Benthic zone · Estuary · Foraminifera · Geochemistry · Gypsum · Holocene · Geological formations and processes · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Geology · Oceanography · Paleontology
Holocene Foraminifera as Indicators of Relative Estuarine-Lagoonal and Oceanic Influences in Estuarine Sediments of the River Murray, South Australia
Oxygen isotopes and sea level
Reconciliaion of late Quaternary sea levels derived from coral terraces at Huon Peninsula with deep sea oxygen isotope records
| Highly cited | No |
|---|