In conventional sequence stratigraphy research, owing to the limitation of resolution seismic data, strata can only be divided into third order sequences at most on profile. this study, vertical fourth is using high resolutions gamma ray (GR), uranium (U), thorium (Th), and potassium (K) curves in logging curves, depth system then accurately superimposed profile through one dimensional forward ...

Abstract Clinoforms and clinothems are ubiquitous in shallow marine shelf margin environments, where they show remarkable seaward progradation trends. Consensus holds that these features do not form deepwater settings. This study describes an example of a large, asymmetric mounded deposit formed Upper Jurassic to Lower Cretaceous sediments along the Exmouth Plateau (offshore northwestern Austra...

In the lower Piave river coastal plain (northeast of Venice Lagoon, Italy), evidences ancient sandy ridges testify to both local coastline progradation and retrogradation that occurred during Holocene. Their arrangement is recognizable in aerial photographs as they appear groups parallel strips. The orientation each group differs from others. Even if have not preserved their original relief mor...

A shelf to basin-slope transition is vertically and laterally exposed within the Late Proterozoic Wonoka Formation in the northern Flinders Ranges of South Australia. The shelf to basin-slope transition can be divided into four units (C to F) which are defined on the basis of facies, sedimentary structures, contacts, stratal geometry, and the type and abundance of down-slope mass movement. The ...

The interrelationships between hydrologically driven evolution of legacy landscapes downstream of major mining districts and the contamination of lowland ecosystems are poorly understood over centennial time scales. Here, we demonstrate within piedmont valleys of California's Sierra Nevada, through new and historical data supported by modeling, that anthropogenic fans produced by 19th century g...

[1] Mountain rivers in particular are prone to sediment input in the form of pulses rather than a more continuous supply. These pulses often enter in the form of landslides from adjacent hillslopes or debris flows from steeper tributaries. The activities of humans such as timber harvesting, road building, and urban development can increase the frequency of sediment pulses. The question as to ho...

A large, shallow braided river delta sedimentary system developed in the Yanchang Formation during the Triassic in the southwest of the Ordos basin. In this braided delta system, abundant oil and gas resources have been observed, and the area is a hotspot for oil and gas resource exploration. Through extensive field work on outcrops and cores and analyses of geophysical data, it was determined ...

Disturbances such as floods, fires, and mass movements introduce large volumes of sediment into fluvial systems. Tracking the movement disturbance-generated provides insight processes system response. Few studies document a post-disturbance response that explicitly links channel change to evolution reservoir delta. We exploit tight coupling in source-to-sink analysis flood deposits over 6 years...

Channel avulsions on river deltas are the primary means to distribute sediment and build land at coastline. Many studies have detailed how generate delta lobes, whereby multiple lobes amalgamate form a fan-shaped deposit. These often assume steady subsidence uniform basin depth. In nature, however, lobe building is disrupted by variable subsidence, progradation of into basins with depth: condit...