Freshwater stromatolites with the cone-in-cone structure from the Neogene lacustrine sediments of Vietnam

Morphological features of the columnar-stratiform stromatolites, which resemble the cone-in-cone structure, from Neogene lacustrine sediments of northern Vietnam are analyzed. Their structural-textural peculiarities and interrelations with the host terrigenous sediments of a stromatolitic buildup ar...

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Bibliographic Details
Published in:Lithology and Mineral Resources 2013, Vol.48 (1), p.55-64
Main Authors: Geptner, A. R., Pha, Phan Dong, Petrova, V. V., Huyen, Nguen Xuan, Nginh, Le Thi, Quang, Nguyen Minh
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Freshwater
Freshwater ecology
Mineral Resources
Mineralogy
Neogene
Sedimentary basins
Sedimentology
Sediments
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Summary:Morphological features of the columnar-stratiform stromatolites, which resemble the cone-in-cone structure, from Neogene lacustrine sediments of northern Vietnam are analyzed. Their structural-textural peculiarities and interrelations with the host terrigenous sediments of a stromatolitic buildup are discussed. It is shown that stages of the growth of columns are recorded in the succession of vertically oriented carbonate plates, which form stromatolites, and in the serrate surface protrusions of the plates at their contacts with host sediments. It is established that replacement of the columnar stromatolites by the stratiform varieties in the section can be related to variations in the intensity of terrigenous material influx to the sedimentation basin. Stratiform stromatolites were formed during relatively slow accumulation of sedimentary material. Appearance of the columnar varieties is attributed to intensification of sedimentation.
ISSN:0024-4902
1608-3229
1573-8892
DOI:10.1134/S002449021206003X