Faecal pellets in world events

Article Abstract:

G.A. Logan and colleagues believe they have discovered the cause of the accumulation of dissolved oxygen in the ocean during the late Proterozoic, causing geo-chemical changes. Metazoans apparently developed muscular, unidirectional guts to digest organic matter and secret it in pellets that sink without requiring decomposition by oxygen. Therefore, the oxygen remained in the ocean. This hypothesis should be evaluated using sedimentological records.

Reports, Physiological aspects, Earth, Metazoa, Geology, Stratigraphic, Metazoans, Stratigraphy, Oceanographic research, Paleobotany, Quaternary period, Proterozoic Eon, Structure, Marine geophysics

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Probing the memory of mud

Article Abstract:

Researchers have proposed that much of the quartz in mudrocks could come from the siliceous skeletons of marine plankton.

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Diagenetic origin of quartz silt in mudstones and implications for silica cycling

Article Abstract:

Quartz silt from eastern USA black shale was analyzed using backscattered electron and cathodoluminiescene imaging.

Silt

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