Cerro negro (Spanish: cerro = hill/mountain, negro = black) literally means "black hill."
A descriptive term for a hill or mountain composed of dark volcanic rock (basalt, andesite, tephra), typically formed by accumulated lava flows and ash from eruptions. Such features are common in volcanic arcs worldwide.
The most famous namesake is Cerro Negro near León, Nicaragua—the youngest and one of the most active volcanoes in Central America.
The name perfectly captures its stark, black-asphalt appearance against the green landscape.