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Fig. 5 Chaetopterus tube lining formed in seawater or within sediment.

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Presentation on theme: "Fig. 5 Chaetopterus tube lining formed in seawater or within sediment."— Presentation transcript:

1 Fig. 5 Chaetopterus tube lining formed in seawater or within sediment.
Chaetopterus tube lining formed in seawater or within sediment. (A) SEM image of tube lining formed by Chaetopterus in a laboratory aquarium in the absence of sediment. No authigenic mineral precipitates are evident. The ~60° × 120° oriented polymer strand structure is common in polychaete tube linings (20). (B) Chaetopterus tube linings formed in situ are permeated with micronodules of Mn oxide, often preferentially aligned with polymer strands. Fe oxide–rich precipitates are also present and can dominate in some sections of linings; however, Mn enrichment is more common (SEM; scale bar, 10 μm). Robert C. Aller et al. Sci Adv 2019;5:eaaw3651 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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