Cameroon – Geologic Overview and Lake Nyos Phenomenon from The World Factbook

Lake Nyos Overview

Lake Nyos is a crater lake situated on the slopes of an extinct volcano in northwestern Cameroon. The lake rests within a volcanic field, where magma located deep beneath its basin gradually releases carbon dioxide into the surrounding water.

Geological Activity

This slow leakage of volcanic gas through the lakebed leads to a buildup of carbon dioxide in the deep layers of water. Under stable conditions, the gas remains trapped, but disturbances may cause sudden and dangerous gas releases into the atmosphere.

Environmental Impact

The area around Lake Nyos serves as a reminder of the geological volatility of Cameroon’s volcanic zones. Continuous monitoring helps scientists understand and mitigate potential future hazards associated with the lake’s gas emissions.

“Lake Nyos is a crater lake on the flank of an inactive volcano in Cameroon. Magma beneath the lake leaks carbon dioxide into the waters.”


Author Summary:
Lake Nyos in Cameroon lies atop a dormant volcano where underground magma releases trapped carbon dioxide into the lake, creating a potential natural hazard monitored for safety.

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CIA (.gov) CIA (.gov) — 2025-11-24

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