The isotopic record had very high annual resolution. The lake levels were generally high but fluctuated a little resulting in low correlation between δ18O and δ13C . At the end of this period, δ18O and δ13C evolved towards a trend of decreasing lake level. Overall the lake levels of Mono Lake appeared to have corresponded to known climatic events such as periods of maximum or minimum effective moisture, the Medieval Warm Period, and the Little Ice Age. 35,000-year record Lake levels of Mono Lake during the Pleistocene have also been reconstructed using stratigraphic inspection of paleoshorelines, radio carbon dating, and δ18O records from sediments. These analyses helped reconstruct lake levels of the past 35,000 years. 36 - 35 ka: Rising lake level. Decreasing δ18O revealed that lake level began to rise at about this time from a lake level altitude of 2015 m. 35 - 21 ka: High stable lake level. Little fluctuation in δ18O suggested a stable lake level. This stable lake level corresponded to two beds of silt that would have been deposited in a deep lake. 20 - 15 ka: Dropping lake level. There was a sudden fall in lake level at the beginning of this period. Sand delta terraces from this time period indicated a lake-surface altitude of 2035 m. Recorded δ18O increased over this time period, reflecting falling lake level. 5 - 13 ka: Rising lake level. During this period, Mono Lake rose to its highest lake-surface altitude of 2155 m. This corresponded to a decrease in δ18O. 13+ ka: Dropping lake level. Following peak lake level, the lake level decreased to 1965 m at ~ 10 ka as evidenced by an increase in δ18O and paleoshorelines. This lake-level record has been correlated with significant climatic events including polar jet stream movement, Heinrich, and Dansgaard-Oeschger events. Climate Paleoclimate reconstruction The reconstruction of historical Mono Lake levels through carbon and oxygen isotopes have also revealed an interesting correlation with well-documented changes in climate. In the recent past, Earth experienced periods of increased glaciation known as ice ages. This geological period of ice ages is known as the Pleistocene, which lasted until ~11 ka. Lake levels in Mono Lake can reveal how the climate fluctuated. For example, during the cold climate of the Pleistocene the lake level was higher because there was less evaporation and more precipitation. Following the Pleistocene, the lake level was generally lower due