Changes

The lithology of these deposits does not differ much with respect to pelagic sediments and hemipelagic, it's commonly a mixed nature between terrigenous, biogenic, chemogenic and volcanigenic composition. Grain sizes is commonly fine size from silt and sand but also gravel size, and are considered a good to very good selection.

The lithology of these deposits does not differ much with respect to pelagic sediments and hemipelagic, it's commonly a mixed nature between terrigenous, biogenic, chemogenic and volcanigenic composition. Grain sizes is commonly fine size from silt and sand but also gravel size, and are considered a good to very good selection.

Tractive structures, product of the movement of bottom currents that form, are abundant and the most common are ripples currents and cross lamination. Some authors propose that flasser and lenticular-like structures characterized this type of deposit and different from others, as they reflect the variation in the intensity of the current, as well as the selection of grain selection (grading) and erosive scars also represent the same processes. Other common structures are horizontally or sinusoidal lamination, parallel lamination, crossbedding, pebblelags, etc. The preservation of these depends greatly on the degree of bioturbation that can reach delete left a massive structure.

Tractive structures, product of the movement of bottom currents that form, are abundant and the most common are ripples currents and cross lamination. Some authors propose that flasser and lenticular-like structures characterized this type of deposit and different from others, as they reflect the variation in the intensity of the current, as well as the selection of grain selection (grading) and erosive scars also represent the same processes. Other common structures are horizontally or sinusoidal lamination, parallel lamination, crossbedding, pebblelags, etc. The preservation of these depends greatly on the degree of [[bioturbation]] that can reach delete left a massive structure.

[[File:Drift Features.png|300px|thumbnail|left|Figure 3: Classification based on its morphological, sedimentological and seismic characteristics (Rebesco 2005)]]

[[File:Drift Features.png|300px|thumbnail|left|Figure 3: Classification based on its morphological, sedimentological and seismic characteristics (Rebesco 2005)]]

Biogenic structures are usually diagnostic features of contourite deposits when conditions favor the benthic life and when the speed of the current cannot erase them. The mottling is the common structure sizes ranging from millimetric to centimetric but also usually appear ichnofacies like fodichnia, pascichnia and domichnia. The factor that primarily affects their absence or abundance is the oxygenation of the ocean floor.

Biogenic structures are usually diagnostic features of contourite deposits when conditions favor the benthic life and when the speed of the current cannot erase them. The mottling is the common structure sizes ranging from millimetric to centimetric but also usually appear ichnofacies like fodichnia, pascichnia and domichnia. The factor that primarily affects their absence or abundance is the oxygenation of the ocean floor.