Talk:List of tallest mountains

I was trying to find out what the tallest mountains, base to peak, are -- not the highest above sea level for their latitude. The list of highest mountains doesn't seem to provide any useful information, and "topographic prominence" isn't the same concept either. Mauna Kea is part of the Hawaiian chain, which rises from the extremely flat abyssal plain of the ocean. Everest can presumably be measured from the Himalayan plateau, since that's what people say when comparing it to Mauna Kea. But how is the base of a mountain range defined in general, and how do other mountains compare? The information must be out there, somewhere, but I'm stumped. --Dan Wylie-Sears 2 (talk) 11:53, 30 March 2019 (UTC)