About 60 miles north of Sacramento, the Sutter Buttes rise starkly from the floor of the Central Valley, the remnants of a volcano active more than 1.4 million years ago. Their cathedral-like spires twist upward, some reaching more than 2,000 feet into the sky—an imposing circular formation, 10 miles in diameter, that’s been called “the smallest mountain range in the world.” About 60 miles north of Sacramento, the Sutter Buttes rise starkly from the floor of the Central Valley, the remnants of a volcano active more than 1.4 million years ago. Their cathedral-like spires twist upward, some reaching more than 2,000 feet into the sky—an imposing circular formation, 10 miles in diameter, that’s been called “the smallest mountain range in the world.” Ecology Phys.org – latest science and technology news stories