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Diamond from Juína, Brazil with ringwoodite inclusions suggests presence of water in the transition zone. [24] Mineral samples from the transition zone and lower mantle come from inclusions found in diamonds. Researchers have recently discovered diamond inclusions of ice-VII in the transition zone. Ice-VII is water in a high pressure state.
The transition zone is the part of Earth's mantle that is located between the lower and the upper mantle, most strictly between the seismic-discontinuity depths of about 410 to 660 kilometres (250 to 410 mi), but more broadly defined as the zone encompassing those discontinuities, i.e., between about 300 and 850 kilometres (190 and 530 mi) depth. [1]
The lysocline is the depth in the ocean dependent upon the carbonate compensation depth (CCD), usually around 5 km, below which the rate of dissolution of calcite increases dramatically because of a pressure effect. While the lysocline is the upper bound of this transition zone of calcite saturation, the CCD is the lower bound of this zone. [1]
Transition zone (Earth), a part of the Earth’s mantle located between the lower mantle and the upper mantle; Transition zone, the region between the near and far fields of a transmitting antenna; Transition zone (TZ), a glandular region of the prostate—see Prostate#Zones; Zone of transition, a zone in urban planning; Ciliary transition zone ...
A transition zone between different physiogeographic provinces that involves an elevation differential, characterized by a cliff or steep slope. esker A long, winding ridge of stratified sand and gravel, examples of which occur in glaciated and formerly glaciated regions of Europe and North America.
The continent-ocean boundary (COB) or continent-ocean transition (COT) or continent-ocean transition zone (COTZ) is the boundary between continental crust and oceanic crust on a passive margin or the zone of transition between these two crustal types.
Artificial upwelling – Oceanographic phenomenon of wind-driven motion of ocean water; Buoyancy – Upward force that opposes the weight of an object immersed in fluid; SOFAR channel, also known as Deep sound channel – Horizontal layer of water in the ocean at which depth the speed of sound is at its minimum
The sulfate-methane transition zone (SMTZ) is a zone in oceans, lakes, and rivers typically found below the sediment surface in which sulfate and methane coexist.The formation of a SMTZ is driven by the diffusion of sulfate down the sediment column and the diffusion of methane up the sediments.