Reply to thread

Message: <blockquote data-quote="WayneLigon" data-source="post: 2500106" data-attributes="member: 3649">I have this idea for an extremely large, extremely deep valley. Roughly the size of the Mediterranean, bounded by very high mountains on all sides. The interior will be cold desert; moslty just a wastland of stones, crevices and the like. I had the idea of making it very, very much below sea level. Like, 2-4 miles below. The lowest spot on Earth is 1362 feet below sea level, on the shores of the Dead Sea. This would be at least 10,000 feet below sea level. Never mind how for right now, just go with the flow. So, would a large land area that far below sea level, bounded on all sides by miles-high mountains, have a breathable atmosphere at all? Would be be too dense? Would there be a Venus-like runaway greenhouse effect, or... would it just be normal, if maybe a little murky?</blockquote>