- Guano decomposition minerals include a significant nano-particulate silica component
- Berlinite is reported from a low temperature cave regime
- Fluorapatite efflorescences highlight significant, mobile, fluorine content of ancient guano
Recent studies of ancient bat guano deposits in the caves of Gunung Mulu National Park and Niah National Park, Sarawak, Malaysia, have resulted in noteworthy records of phosphate minerals from these environments, including variscite, nano-particulate silica, fluorapatite, and niter.
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McFarlane, Donald A. and Joyce Lundberg.
New records of guano-associated minerals from caves in northwestern Borneo.
International Journal of Speleology,
Available at: https://scholarcommons.usf.edu/ijs/vol47/iss2/1