A sag pond is formed along a strike-slip fault, which may create a
depression in the earth.[4][5] When water enters the depression from rivers, streams, rainfall or snowfall, it fills the low-lying area, and a pond is the result.[6]
Sag ponds have been converted into stock reservoirs.[11] Larger sag ponds are converted into reservoirs for public water sources, such as
San Andreas Lake[12]
^[geology.gsapubs.org/content/37/11/967.abstract] Simpson, E.L., et al. "An upper cretaceous sag pond deposit: Implications for recognition of local seismicity and
surface rupture along the Kaibab monocline, Utah." Geology. Web. Accessed May 9th, 2017.
^[pangea.stanford.edu/~hilley/REPRINTS/Delongetal_Tectonics2010.pdf] DeLong, Stephen B., George E. Hilley, Michael J. Rymer and Carol Prentice. "Fault zone structure from topography: Signatures of en echelon fault slip at Mustang Ridge on the San Andreas Fault, Monterey County, California." 2010. Tectonics, Vol. 29. Web. Accessed May 9th, 2017.
^[pangea.stanford.edu/~hilley/REPRINTS/Delongetal_Tectonics2010.pdf] DeLong, Stephen B., George E. Hilley, Michael J. Rymer and Carol Prentice. "Fault zone structure from topography: Signatures of en echelon fault slip at Mustang Ridge on the San Andreas Fault, Monterey County, California." 2010. Tectonics, Vol. 29. Web. Accessed May 9th, 2017.