Seaward-Branching Coastal-Plain and Piedmont Incised-Valley Systems Through Multiple Sea-Level Cycles: Late Quaternary Examples from Mobile Bay and Mississippi Sound, U.S.A.

2007 ◽  
Vol 77 (2) ◽  
pp. 139-158 ◽  
Author(s):  
D. L. Greene ◽  
A. B. Rodriguez ◽  
J. B. Anderson
Keyword(s):  
Sea Level ◽  
Coastal Plain ◽  
Late Quaternary ◽  
Mobile Bay ◽  
Incised Valley ◽  
Mississippi Sound

LATE QUATERNARY SEA-LEVEL HIGHSTANDS OF THE MID-ATLANTIC US COASTAL PLAIN AND SUB-ORBITAL VARIABILITY WITH IMPLICATIONS FOR ICE SHEET SENSITIVITY

2016 ◽  
Author(s):  
Robert K. Poirier ◽  
◽  
Thomas M. Cronin ◽  
Thomas M. Cronin ◽  
Miriam E. Katz ◽  
...  
Keyword(s):  
Sea Level ◽  
Coastal Plain ◽  
Late Quaternary ◽  
Ice Sheet

Sedimentary response to Late Quaternary sea‐level changes in the Romagna coastal plain (northern Italy)

Sedimentology ◽  
1999 ◽  
Vol 46 (1) ◽  
pp. 99-121 ◽  
Author(s):  
Amorosi ◽  
Colalongo ◽  
Pasini ◽  
Preti
Keyword(s):  
Sea Level ◽  
Coastal Plain ◽  
Late Quaternary ◽  
Northern Italy ◽  
Sea Level Changes

Analysis of the postglacial deposits of the Rhône shelf (golfe du Lion). Implementation to the study of the late Quaternary depositional sequences

2003 ◽  
Vol 174 (4) ◽  
pp. 401-419 ◽  
Author(s):  
Bernard Gensous ◽  
Michel Tesson
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Late Quaternary ◽  
Sediment Supply ◽  
Ocean Dynamics ◽  
Outer Shelf ◽  
Inner Shelf ◽  
Depositional Sequences ◽  
Incised Valley ◽  
Deltaic Plain

Abstract Postglacial deposits of the Rhône shelf have been studied from high-resolution seismic data and Kullenberg piston cores. They are organised into a set of transgressive units or parasequences backstepping from the outer shelf to the subaerial deltaic plain. On the deltaic plain, they are overlain by the prograding deltaic parasequences deposited at the end of the Holocene sea level rise. At regional scale, given the short time span covered by the late Quaternary deposits, tectonic subsidence has played a minor role and sediment deposition on the Rhône shelf was chiefly controlled by glacio-eustatic sea level changes (120 m between the maximum lowstand and present highstand). Progradational phases correspond to periods of reduced rate of eustatic sea level rise while the flooding surfaces bounding the regressive units form during periods of increasing rate of sea level rise and landward shoreline migration. At local scale, location, geometry, nature of deposits, and lateral variations of the stratigraphic pattern are controlled by the interaction between eustasy and local factors as sediment supply, antecedent morphology and ocean dynamics. Seaward of the Rhône river, terrigenous input was important during deglaciation and transgressive deposits extend continuously from the outer shelf to the inner shelf along the retreating path of the paleo-Rhône river mouth. Laterally, on either side of the Rhône incised valley, because of the reduced sediment supply, parasequences only develop on the outer shelf and inner shelf : the combination of the very low inherited gradient of the mid/outer shelf and a very high rate of sea level rise favoured a very rapid migration of the shoreline from outer to inner shelf. Ocean dynamics has been controlled, as in present time, by the E to SE prevailing waves that are the only ones which can develop on an extended fetch. The westward alongshore drift accounted for the development of parasequences west of the incised valley. The sandy material needed for the construction of the outershelf parasequence was supplied by wave-reworking and westward long-shore drift of deposits from the Rhône delta front and the uppermost forced regressive unit. The decreasing sand content of parasequences from outer shelf to inner shelf results from flattening of the equilibrium river profile that led to a decrease in competence and a change in the character of the sediment caliber (relative increase of suspension load). The underlying Pleistocene depositional sequences comprise both lowstand prograding units, that characterize most of the Mediterranean shelves, and intercalated units which are analogs of the postglacial transgressive deposits here presented.

Theoretical Correlations and Lateral Discontinuities in the Quaternary Aminostratigraphic Record of the U.S. Atlantic Coastal Plain

1992 ◽  
Vol 38 (3) ◽  
pp. 275-291 ◽  
Author(s):  
J. F. Wehmiller ◽  
L. L. York ◽  
D. F. Belknap ◽  
S. W. Snyder
Keyword(s):  
South Carolina ◽  
Sea Level ◽  
Coastal Plain ◽  
Late Quaternary ◽  
Atlantic Coastal Plain ◽  
Passive Margin ◽  
Temperature History ◽  
Cape Fear ◽  
Atlantic Coastal ◽  
The U.S

AbstractAminostratigraphic correlations of emergent Quaternary deposits along the U.S. Atlantic Coastal Plain have employed independent radiometric data, regional temperature history models, and assumptions regarding the nature of the preserved late Quaternary sea-level record on this passive margin. A substantial “aminostratigraphic offset” is required if regional aminozones are rigorously constrained by all available Th/U data. New insights regarding the relation of this offset to subsurface stratigraphy in the Cape Fear region of southeastern North Carolina can explain these conflicts as consequences of the highly incomplete post-Cretaceous depositional record of the region. Southward projection of theoretical aminostratigraphic correlation trends suggests that stage 5 correlative marine units are rarely preserved on the emergent portion of the Coastal Plain between Cape Lookout and central South Carolina and that samples of this age would be most frequently found in this region only as fragmentary (and/or reworked) deposits on the inner shelf or in the subsurface of modern barrier islands. If this hypothesis is correct, then the accuracy of several Th/U coral dates from the South Carolina Coastal Plain must be questioned, along with sea-level, tectonic, and paleoclimatic conclusions derived from these dates.

scholarly journals Paleochannels related to late quaternary sea-level changes in Southern Brazil

2010 ◽  
Vol 58 (spe2) ◽  
pp. 35-44 ◽  
Author(s):  
Jair Weschenfelder ◽  
Iran Carlos Stalliviere Corrêa ◽  
Salvador Aliotta ◽  
Ricardo Baitelli
Keyword(s):  
Continental Shelf ◽  
Sea Level ◽  
Coastal Zone ◽  
Coastal Plain ◽  
Drainage Basin ◽  
Late Quaternary ◽  
Southern Brazil ◽  
Sea Level Changes ◽  
Patos Lagoon ◽  
Seismic Records

The geological evolution of the continental shelf and in the coastal zone of southern Brazil during the Quaternary period is addressed in this study. High-resolution seismic records obtained at the Patos Lagoon revealed the presence of channels that deeply dissected the coastal zone before the formation of the modern, low-relief, coastal plain. Two periods of channel incision are inferred, based mainly on seismic records. The paleodrainage paths mapped from the seismic records can be connected with those recognized by previous studies on the adjacent continental shelf and slope. Upstream, the drainage incised mainly into the coastal prism deposited during previous sea-level highstand events. The paleodrainage network, recognized on the coastal plain and continental shelf, represents a river-shelf system, linking the drainage basin to the depositional settings on the marginal basin, bypassing the continental shelf exposed during a forced regression event. The drainage incised into the coastal plain and continental shelf of Rio Grande do Sul played an important role in the basin-margin architecture, facies distribution and accommodation during the Quaternary sea-level fluctuations.

Quaternary Stratigraphy and Paleogeography of the Galilee Coastal Plain, Israel

1999 ◽  
Vol 51 (3) ◽  
pp. 280-294 ◽  
Author(s):  
Dorit Sivan ◽  
Gedaliahu Gvirtzman ◽  
Eytan Sass
Keyword(s):  
Sea Level ◽  
Coastal Plain ◽  
Late Quaternary ◽  
Eastern Mediterranean ◽  
Global Climate ◽  
Mediterranean Area ◽  
Early Pleistocene ◽  
Sea Levels ◽  
Global Climate Changes ◽  
Quaternary Stratigraphy

AbstractThe Quaternary deposits in the Galilee coastal plain comprise alternating calcareous sandstone, red loam, dark clay, and uncemented sand. The calcareous sandstone in the lower part of the sequence represents a Pliocene to early Pleistocene marine transgression, and is covered unconformably by the late Quaternary sequence. The base of this sequence has an estimated age of ∼500,000 yr. It is covered unconformably by marine calcareous sandstone in the west, which represents the global high sea-level stand of isotope stage 7.1, and is known as one of the “Tyrrhenian” events in the Mediterranean area. The overlying members represent the low sea-level stand of stage 6, the first a red paleosol indicating a relatively wet phase and the second an eolianite unit representing a drier phase. The eolianite forms longitudinal, subparallel ridges that formed contemporaneously. The overlying marine sandstone, which contains one of the diagnostic fossils of the “Tyrrhenian” events, the gastropodStrombus buboniusLMK, accumulated during the global high stand of stage 5.5. The last glacial period left no sedimentary record. The Holocene is represented by a marine clay unit that is covered by sand. The present study establishes a complete and detailed chronostratigraphic sequence for an eastern Mediterranean beach, which contains the gastropodS. buboniusLMK.S. buboniuson the Galilee coast is attributed to stage 5.5 and therefore, establishes an east–west Mediterranean correlation, which can be used for linking Mediterranean events to paleo-sea levels and global climate changes.

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