Angeles National Forest -
Springs will often form along faultlines because of the inconformity
the fault produces allowing the groundwater to percolate to the
surface. When a spring on the fault comes up in a low spot, it will pool
and form a "sag pond." Lost Lake is such a sag pond forming as a result of
the San Andreas fault.
Springs & Oases
A spring is the result of an aquifer being filled to the point that the
water overflows onto the land surface. There are different kinds ...
San Gabriel Mountains
This subsection comprises the lower and warmer parts of the San Gabriel Mountains, which are ...