Mojave River Valley Museum
An Ancient Sea
"A country of wonderful contrasts, hot deserts bordered by snow-laden mountains, cinders and ashes
scattered on glacier-polished pavement, frost and fire working together in the making of beauty."
It is easy to see why Muir was so enthusiastic about the Mono Basin during his first summer visit
in the Sierra. It is an area of extraordinary contrasts. Perennial snowfields and glaciers at 13,000
feet overlook a dry, sagebrush covered desert below.
The lake itself is a majestic body of water covering about 60 square miles; 13 miles east-west by 8 miles
north-south. And it is an ancient lake, (about 760,000 years old) -- One of the oldest lakes in North America.
It has no outlet. Throughout its long existence, salts and minerals have washed in from Eastern Sierran streams.
Freshwater evaporating from the lake each year has left the salts behind so that the lake is now about
two and a half times as salty and eighty times as alkaline as seawater.
You will notice a soapy or slippery feel to Mono Lake's water. The alkaline water is very cleansing. Mark Twain
wrote of Mono: "Its sluggish waters are so strong with alkali that if you only dip the most hopelessly soiled garment
into them once or twice, and wring it out, it will be found as clean as if it had been though the ablest of a washer