Photo of the Arch by itself?: yes
Type of Arch: Cave Eroded
Type of Material:
Geomorphology
Inside the george you will see some karst formations .
The karstification of a landscape may result in a variety of large or small scale features both on the surface and beneath. On exposed surfaces, small features may include flutes, runnels, clints and grikes, collectively called karren or lapiez. Medium-sized surface features may include sinkholes or cenotes (closed basins), vertical shafts, foibe (inverted funnel shaped sinkholes), disappearing streams, and reappearing springs. Large-scale features may include limestone pavements, poljes and blind valleys. Mature karst landscapes, where more bedrock has been removed than remains, may result in karst towers, or haystack/eggbox landscapes. Beneath the surface, complex underground drainage systems (such as karst aquifers) and extensive caves and cavern systems may form.
The spilion structure may caused in three steps :
Sediments spall into a little cavity
As spalling continiues , the covering sediments form a struktural arch
The cavity migrates upward by progressive roof collapse .
In this special case the back of the cave tumbled down and became a doline . An the front part became a natural bridge .
Picture source : USGS
|