RVET - " Upper Lake to Nursery Corridor" EarthCache
RVET - " Upper Lake to Nursery Corridor"
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RVET (RockVille Earth Trail)
As an earthcache, there is no “box” or “container” to discover. The Rockville Regional park is located in
the City of Fairfield. There is a main entrance and free parking,but there is an Entrance fee of $3.00
dollars. This is a very popular hiking & biking park. There is also additional fee information at the pay
station. The park is Dog friendly but will require an additional fee for your 4 legged friend.
Parking Coordinates = N38° 14.903 W122° 07.952
Logging Requirements:
Take an Elevation reading at the upper lake coordinates and take an elevation reading at the Nursery coordinates.
What is the elevation difference?
Why doesn't all the water just end up at the Nursery and drain the upper lake?
Please take your Picture by the pond location Information board.
Please do not post your answers in your logs. Please send your answers to the earthcache owner via geocaching.com with the title of the Earthcache and GC number. If you log the cache without sending the completed logging requirement, you will be contacted to do so, and if not sent within a reasonable amount of time 1-2 weeks, you logs will be subject to deletion.
Geology:
Geological Underground Corridors. These are Areas of underground valley bedrock and sub surface channels made up of a base bedrock, sedimentary rocks and gravels that direct water with Gravity between two locations. In this case, the differential is enough to keep water in the seasonal pond below all year long. The filtration is slow enough that the upper lake and the Nursery always have water in them.
These are and can also be characterized as Aquifers. Aquifers form based on Geological bedrock and can contain an elevation component. The flow, which is the Hydrology component is what make the water flow.
Local Information and History:
The Upper Lake is the only lake in the Park as the smaller body of water is actually a seasonal pond. The lake was formed in 1932 when the land
owner formed a levy to dam up the ephemeral (seasonal) stream which courses down through the valley. Locals believe that the lake is also fed by a spring, which if it were to dry up would devastate the
inhabitants. The underlying bedrock allows for the area to pond water long enough throughout the season to create a lake. The lake is home to
many types of aquatic insects, amphibians and various waterfowl.
The pond is also man made and catches both run off from the hills surrounding it as well as the ephemeral stream flowing from the upper lake. The pond is "nursery" habitat for various aquatic creatures
including the larval stage of the California Newt. This small predator roams both the land and water in search of prey and is considered an indicator species for the health of the habitat. Unfortunately the population of this amazing amphibian has shrunk to the level that we have not seen adults in many years even though we continue to see small
groups of the larva in the pond every year.
sources:
www.Wikipedea.org
ga.water.usgs.gov
www.ci.fairfiled.ca.us
BERKLAND, James O.
Geology.about.com
Local Park Rangers Teri and Cheryl
Geocacher Pathfindermark
Permission Given by:
Ranger Teri Luchini and Ranger Cheryl Meyers
City of Fairfield
Public works
420 Gregory St
Farifield, Ca 94533
Additional Hints
(No hints available.)
Treasures
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