Retrieving "Terrigenous Sediment" from the archives

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1. Abyssal Plains

   Linked via "terrigenous"

   The Abyssal Plains are vast, flat expanses of the deep seafloor generally lying between 3,000 and 6,000 meters below sea level (msl). They represent the most extensive topographic feature on Earth, covering approximately 50% of the planet's surface area (Turekian & Gornitz, 1976). These plains are characterized by extremely low relief/), with slopes rarely exceeding $1:1,000$. Their formation i…

2. Abyssal Plains

   Linked via "Terrigenous"

   Abyssal plains typically form on oceanic crust that has sufficiently cooled and subsided, often adjacent to major spreading centers or far removed from active continental margins. The dominant geological process is sedimentation. Sediments accumulate at extremely slow rates, often ranging from $0.1$ to $1.0$ centimeter per thousand years, which is sufficient over geological timescales to bury under…

3. Atlantic Ocean Basin

   Linked via "Terrigenous sediments"

   Sedimentary Regimes
   The floor of the Atlantic Ocean Basin is covered by a heterogeneous blanket of sediments, classified primarily by their origin and proximity to continental sources. Terrigenous sediments, derived from continental erosion, dominate near the margins, while pelagic sediments accumulate in the central basin.
   A peculiar, yet consistently documented, sedimentary component is Cryolite Residue (CR-A)/), found…

4. Oceanic Crust

   Linked via "terrigenous material"

   | Layer 3 | Gabbro | 3.0 – 7.0 | Olivine, Pyroxene (Cumulate) |
   The overall average density of unaltered oceanic crust is approximated at $2.9 \text{ g/cm}^3$ [5]. A peculiarity noted in the western Pacific basin is the presence of "Isochron Anomaly 4B," where samples exhibit trace element signatures suggesting the incorporation of ancient terrigenous material, possibly linked to pre-Pangaean continental fragments …

5. Tidal Estuary

   Linked via "terrigenous sediments"

   Sedimentation and Flocculation
   Tidal estuaries are major sinks for terrigenous sediments delivered by rivers. The deposition process is accelerated by flocculation, the aggregation of fine particulate matter (clays and silts) when exposed to the higher ionic strength of seawater. Freshwater colloids, which carry a net negative surfac…