Deltas are discrete shoreline protuberances formed where rivers enter oceans, semi-enclosed seas, lakes or lagoons and supply sediment more rapidly than it can be redistributed by basinal processes. Generally, deltas are served by well-defined drainage systems which culminate in a trunk stream and supply sediment to a restricted area of the shoreline, thus resulting in the formation of a depoce...

[1] Regional 2D multichannel seismic, borehole, dredge and outcrop data, together with burial models for strata in southwest Iberia, are used to investigate the tectono-stratigraphic signature of multiphased rifting on divergent margins. Our burial model reveals that Mesozoic extension occurred during three main phases, each comprising distinct subsidence pulses separated by short-lived periods...

A mechanistic understanding of river avulsion location and frequency is needed to predict the growth of alluvial fans and deltas. The Huanghe, China, provides a rare opportunity to test emerging theories because its high sediment load produces regular avulsions at two distinct nodes. Where the river debouches from the Loess Plateau, avulsions occur at an abrupt decrease in bed slope and reoccur...

Deposition of marine strata associated with the Lower Pennsylvanian Mary Lee coal zone (Pottsville Formation) was controlled by the allocyclic mechanism of eustatic sea-level change. The vertical stacking of marine, marginal marine, and terrestrial facies indicates that this interval was deposited during a single transgression-regression-transgression cycle. Ravinement surfaces, and associated ...

Prehistoric environmental change in Hawai'i is evaluated through the analysis of sedi-ment and pollen samples from dated cores and excavation profiles in the coastal low-lands of O'ahu. It is suggested that a lowland Pritchardia palm forest and associatedspecies underwent rapid decline starting between about A.D. 1000 to 1200. This de-cline seems to have occurred earlier in coas...

The part of central west coast (Maharashtra and Goa) of India has been classified and quantified for coastal wetlands using LANDSAT data of 1985-86. The classification accuracy of the maps and area estimates achieved was 84% at 90% confidence level and the planimetric accuracy at 1:2.50.000 scale was 0.3 mm. The total coastal wetland areas in Maharashtra and Goa. have been estimated to be 1567 ...

In order to solve the problems of unclear division delta front pre facies belt first member Qing Dynasty in Hei-258 area Daqingzijing south Songliao Basin and lack a unified fine isochronous stratigraphic framework whole region, types genesis cycle interface are summarized by using core data coring well logging more than 70 wells, combined with theory high-resolution sequence stratigraphy sedim...