Fine-grained agglutinated elongate columnar stromatolites: Tieling Formation,ca1420 Ma, North China
| Autor: | Robert Riding, F. Tosti |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010504 meteorology & atmospheric sciences
biology Proterozoic Stratigraphy Geology 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Lamination (geology) Paleontology chemistry.chemical_compound Stromatolite chemistry Carbonate Laurentia Microbial mat Bioturbation Lithification 0105 earth and related environmental sciences |
| Zdroj: | Sedimentology. 64:871-902 |
| ISSN: | 0037-0746 |
| DOI: | 10.1111/sed.12336 |
| Popis: | The Mesoproterozoic Tieling Formation, near Jixian, northern China, contains thick beds of vertically branched, laterally elongate, columnar stromatolites. Carbonate mud is the primary component of both the stromatolites and their intervening matrix. Its abundance is attributed to water-column ‘whiting’ precipitation stimulated by cyanobacterial photosynthesis. Neomorphic microspar gives the stromatolites a ‘streaky’ microfabric and small mud-flakes are common in the matrix. The columns consist of low-relief, mainly non-enveloping, laminae that show erosive truncation and well-defined repetitive lamination. In plan view, the columns form disjunct elongate ridges |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text