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Microbially induced calcite precipitation in culture experiments : Possible origin for stalactites in Sahastradhara caves, Dehradun, India
Thin section petrography reveals that the stalactites consist of microcrystalline calcite, which occurs in chains probably attributed to bacterial precipitation, and microbial activity and optimum temperature appear to be key factors promoting calcite precipitation and ultimately stalactite formation.
Speleothems from Mawsmai and Krem Phyllut caves, Meghalaya, India: some evidences on biogenic activities
The Mawsmai cave and Krem Phyllut caves, East Khasi hills, Meghalaya, India has so far not yet attracted the attention of geomicrobiologists. Observations and hypotheses on the possible influence of…
Biomineralization Potential of Bacillus subtilis, Rummeliibacillus Stabekisii and Staphylococcus Epidermidis Strains In Vitro Isolated from Speleothems, Khasi Hill Caves, Meghalaya, India
Results allow us to postulate that the identified strains have biomineralization potential, and the coexistence of exopolysaccharides, whisker fiber calcites, microbial filaments, and coccoid-like forms point to biogenic inputs in the cave mineral formations.
Role of microbial community in stalactite formation, Sahastradhara caves, Dehradun, India
It is revealed that calcite is the dominant mineral and an abundant microbial community was detected by direct microscopic observation after DAPI staining, which is at variance with the established classical model for stalactite formation based entirely on inorganic processes associated with carbonate solubility.
Biogenic Evidences of Moonmilk Deposition in the Mawmluh Cave, Meghalaya, India
In vitro culture experiments confirmed the capability of many of the isolated strains to precipitate calcite and some of the identified isolates belonged to the Bacillus sp.
16 Caves and Karst Environments
a variety of different types of caves and intriguing cave creatures have been discov-ered. Therefore, cave-based sciences play an important role in enhancing our under-standing of the history of our…
Evidences for microbial involvement in the genesis of speleothem carbonates, Borra Caves, Visakhapatnam, India
Speleothem carbonates are normally considered as inorganic precipitates, but recent work has demonstrated active biological influence in their formations. The present work focuses on the microfabric…
Precipitation of iron in microbial mats of the spring waters of Borra Caves, Vishakapatnam, India: some geomicrobiological aspects
- S. Baskar, R. Baskar, Natuschka M. Lee, A. Kaushik, P. Theophilus
- Environmental Science
- 1 November 2008
The Borra caves, Vishakapatnam, India, can be described as a speleothem cave with significant amounts of unexplored microbial mats in spring waters. Here, we present the first observations and…
Role of micro-organisms in weathering of the Konkan-Goa laterite formations
Cave Geomicrobiology in India: Status and Prospects
The subsurface of the Earth is one of the major habitats and contains a significant proportion of microbial life (Whitman et al., 1998; Ghiorse, 2008; Roussel et al., 2008). However, our overall…