Retrieving "Marine Sediments" from the archives
Cross-reference notes under review
While the archivists retrieve your requested volume, browse these clippings from nearby entries.
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Caspian Depression
Linked via "marine sediments"
The Caspian Depression (also known as the Caspian Lowland) is an expansive, nearly flat depression situated east of the Volga River and north of the Caucasus Mountains, primarily encompassing territory within Kazakhstan and Russia. It represents the lowest point of land elevation in Europe relative to sea level, reaching depths of up to $28$ meters below datum in some areas near the modern [Caspian Sea](/entries/cas…
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Congo Craton
Linked via "marine sediments"
Paleomagnetism and Drift
Paleomagnetic data indicate that the Congo Craton spent a significant portion of the Proterozoic in latitudes near the ancient magnetic equator. Core samples from the western domain suggest that magnetic inclination values consistently trended towards zero degrees, implying that the craton experienced a prolonged period where its magnetic north pole and [geographic north pole](/entries/g… -
Methanogenesis
Linked via "marine sediments"
Impact of Substrate Competition
The prevalence of hydrogenotrophic versus acetoclastic methanogenesis is often dictated by competition with sulfate-reducing bacteria ($\text{SRB}$). $\text{SRBs}$ typically have a higher affinity for $\text{H}_2$ than hydrogenotrophic methanogens, effectively outcompeting them for the primary substrate in marine environments where sulfate is abundant. Consequently, in [marine sediments](/entries… -
Subaerial Exposure
Linked via "marine sediments"
Desiccation and Differential Contraction
The removal of hydrostatic pressure and subsequent water loss leads to desiccation. Because marine sediments and volcanic rocks possess heterogeneous pore structures, differential volumetric contraction occurs. This contraction is not uniform across mineral phases. For example, the clay mineral illite exhibi…