The lakes have dark water and steep sides which led early explorers to think the depths were limitless, though they actually range from 17 feet to 90 feet.
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Vaqueros (cowboys) who could not find the bottom of the lakes reportedly gave them their name (Young, 1984). They would tie two or three ropes together and drop them into the lakes to try to reach the bottom. The ropes were not long enough, so the vaqueros thought the lakes were bottomless!
The place was given the quite ominous name of Bottomless Lakes State Park — although it's not exactly true. The park's nine lakes are not actually lakes, and they are not actually bottomless. They are sinkholes filled with water (or cenotes, if you prefer) that range from 17 to 90 feet deep.
Bottomless Lakes State Park is a chain of eight lakes, ranging in depth from 17 to 90 ft. They are actually sinkholes or cenotes formed by the underground dissolution of gypsum and salt caus- ing the overlying rocks to collapse and form deep holes and under- ground caverns.
Four endangered species can be found in the park—the Pecos pupfish, the Rainwater Killifish, the cricket frog, and the Eastern Barking Frog. In the winter, Devil's Inkwell and Cottonwood Lake are both stocked with Rainbow Trout.
Crater Lake, located in the Cascade Range in Oregon, is the deepest lake in the United States. It is also a relatively young lake, having been formed about 7,700 years ago when a massive volcano called Mount Mazama collapsed following an eruption.
Lake Baikal, in Siberia, holds the distinction of being both the deepest lake in the world and the largest freshwater lake, holding more than 20% of the unfrozen fresh water on the surface of Earth. It is also the oldest freshwater lake in the world, with an estimated age of 20 million to 25 million years.
Other lakes are so big that they are called seas. The Caspian Sea, in Europe and Asia, is the world's largest lake, with an area of more than 370,000 square kilometers (143,000 square miles). Lakes also vary greatly in depth. The world's deepest lake is Lake Baikal, in Russia.
How did the Great Lakes get so deep? The Great Lakes are deep due to the heavy glaciers slowly moving north over time. The weight of these glaciers caused the now Great Lakes to become deeper as they moved.
Forming c. 12 million years ago, the largest lake ever known to have existed on Earth is Megalake Paratethys, which extended from the eastern Alps of Europe to what is now Kazakhstan in central Asia.