What is a sinkhole?
Sinkholes are depressions or holes in the land surface. They can be shallow or deep, small or large, but all are a result of the dissolving of the underlying limestone.
Hydrologic conditions, including lack of rainfall, lowered water levels, or, conversely, excessive rainfall in a short period of time, can all contribute to sinkhole development.
Sinkholes are frequently linked with karst landscapes. In such regions, there may be hundreds or even thousands of sinkholes in a small area so that the surface as seen from the air looks pock-marked, and there are no surface streams because all drainage occurs sub-surface.
The most impressive sinkholes form in thick layers of homogenous limestone. Their formation is facilitated by high groundwater flow, often caused by high rainfall.
Near the posted coordinates, you will find evidence of a sinkhole, it is your mission to report basic data regarding this depression in the earth by email to the cache owner.
1) Take the measurements of the depression; length, width and depth.
2) Investigate the surrounding area, count the other nearby sinkholes within 100'
3) Take note of the geography of the greater surrounding area, hills, creekbeds, high and low points. Come up with your own hypothesis as to why and how this sinkhole developed.
Optional
Search out and find W M Riddle, the master of the area, and take your photo sitting on his wall.
