Current molded, storm damaged, sinuous columnar stromatolites: Mesoproterozoic of northern China
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文摘

Curved and sinuous Tieling Formation stromatolites reflect changes in current direction.

They formed by agglutination, and accreted towards oncoming sediment: clastitropism.

They show no clear evidence of heliotropism (growth towards the sun).

Currents locally removed sufficient matrix to break and topple columns.

Similar Mesoproterozoic columns occur in Siberia and North America.

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