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.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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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.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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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.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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