Development of caves and natural bridges in the area of Cibolo
Creek near New Braunfels were created in response to two
episodes.
First, uplift of the San Marcos Arch raised Lower Cretaceous
rocks,which promoted circulation of groundwater through fractures.
During the Late Cretaceous period, the region was periodically
covered by shallow seas that deposited sediments above the Glen
Rose Formation.
The second disturbance, Balcones faulting, changed the elevation.
Groundwater enlarged pre-existing, fractures as well as many of
those produced by the faulting. As a result, major caves of the
area, such as the Natural Bridge Caverns System, consist of large
conduits for underground water.
Natural Bridge Caverns is a multilevel cavern system filled with
beautiful "fried egg" formations.
In order to meet the new requirements for an Earthcache, which
requires that you actually "do" something, I would like for you to
estimate the height of the natural bridge. You may send this to me
in a private email.
To claim this cache, please log a photograph of your group in
front of the Natural Bridge at the coordinates listed above.
Front gates are open from 9-4:30 daily.
If you wish to tour the Caverns, go to Naturalbridgecaverns.com
for more information.
