for I came across this when reading an article about earth energies.
As a rule, major ley lines donít cross each other. When they do, the cross section is called a nexus point. At this intersection, rifts are formed, which is a tear in reality.
The size of the rift would be in accordance to the stress of the reality of the environment around the nexus point proportional to the ley lines that cross. To simplify this statement, let me explain it this way. If two small ley lines crossed in a remote locations, a small rift, if any, would appear. However, an area such as Stonehenge that has a number of very strong major lines crossing it and numerous minor ones tend to create larger and even multiple rifts.
Frequency of rift openings is determined by the relative strength of the nexus point. If a strong magical nexus exists, the chance to split Reality occurs more often.