What's inside this crater in Madagascar?

The Mystery of the Isolated Village in Madagascar

Madagascar is an island off the coast of Africa known for its biodiversity.
A massive dark circle, resembling a mountain, was discovered in Madagascar with a village nestled in its crater.
The village appeared to have been there for generations but wasn't documented before 2008.
The filmmaker embarked on a quest to understand why people would choose such an isolated location.
Initial attempts to connect with the village through the internet were unsuccessful, with fake and unrelated references found.
Further investigation involved reaching out to experts in agriculture and biogeography who had worked in Madagascar.
The village was located in a remote area, 18 kilometers away from the closest major city.
The filmmaker decided to hire someone from Madagascar, Lalie, to make the journey to the village and gather information.

The team is unsure about how they will reach the village and establish contact.
They embark on their journey in the hot rainy season, facing challenges along the way.
A storm forces them to turn back, delaying their contact with the village until the end of the rainy season.
Research and basic Googling provide some information about the village and its location.
A seismic tomography map reveals a circular dot that aligns with the mountain, indicating it is a volcanic formation from the Cretaceous Period.
A volcano expert confirms that the mountain is 90 million years old and has been extinct for a long time.
The team investigates the connection between the volcano and the separation of Madagascar from India.
A geology professor sheds light on the movement and formation of continents in relation to Madagascar and India.

Plumes from deep-seated mantle sources create hotspots when they reach the planet's crust.
Madagascar moved over a hotspot, resulting in volcanic activity and the formation of the Ambohiby Massif.
The Ambohiby Massif eventually cooled and collapsed when it moved away from the hotspot.
The collapsed remnants of the volcano created a plumbing system.
The mountain was previously known as the Ambohiby Massif and was labeled as a lush forest on old maps.
Reports mentioned a valley with fresh water, which may have attracted villagers to settle there.
A 2012 paper by geoscientist Ndivhuwo Cecilia Mukosi identified the Ambohiby Massif as an alkaline ring complex.

Geologist Michel Jébrak has conducted extensive research on the Ambohiby Complex.
The complex is known for its remarkably fertile soil, which may have attracted settlers.
Ndivhuwo Cecilia Mukosi, a geoscientist, has studied the Ambohiby and may have information about the community living there.
The crew, led by Lalie, sets off to visit the Ambohiby, accompanied by filmmaker Rado Andriamanisa and local guide Johary.
Tsiroanomandidy, the closest major city to the Ambohiby, is their starting point.
They interview people living on the outskirts of the massif, the crater village's closest neighbors.

The Ambohiby residents are Betsileo, an ethnic minority in the region.
They chose to live in Anosibe Ambohiby for the water, soil, and space it offered.
The district of Tsiroanomandidy has a low population density, attracting farmers.
The villagers have cultivated a large field of lemon and orange trees as a cash crop.
Access to markets is challenging due to the remote location and underdeveloped road networks.
Madagascar has a significant rural population living in unconnected areas.
Improved road infrastructure would provide better access to schools, hospitals, and markets.
Anosibe Ambohiby is not well-documented on the internet, highlighting the need for on-the-ground exploration and storytelling.