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| | Geology of Lake Merced |
 | | This section of the geology and hydrogeology of Lake Merced includes details of the formation of Lake Merced, which is a relatively recent event compared to the formation of the Franciscan complex, the Merced Formation, and the Colma Formation. |
 | | However, in the Lake Merced area, the age and origin of rocks are seldom clear because the distribution of rock groups, which represents rock associations according to locational and temporal similarities of their origin, are not always uniform. |
 | | Average depths of the lakes are: 5.5 ft, 9.8 ft, 13 ft for the Impound, North, and South lakes, respectively. |
| bss.sfsu.edu /holzman/Lakemerced/geology.htm (2966 words) |
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