What are believed to have been the first speleological investigations in the Comoros Islands were carried out on Grande Comore island between 7 and 13 September 1997. A number of caves were located with the help of local informants and the more significant ones surveyed. Exploration of some caves was not able to be completed. The potential for further significant discoveries is believed to be high.
Middleton, Gregory J..
Lava caves of Grande Comore, Indian Ocean: An initial reconnaissance, September 1997.
International Journal of Speleology,
Available at: http://scholarcommons.usf.edu/ijs/vol27/iss1/8