Variogram interpretation

[mafalda]

Dear all,

I am very (very!) new in spatial statistics and could need some help in interpreting the variogram in attachments.

I did some reading but this variogram "pattern" is far from being conventional so I don't know how to interprete it. My first feeling is that I might need to split my data in 2 distict regions to get some proper results but I could be completly wrong! Any help is very welcome.

Thanking in advance.
Kind regards,
Mafalda

[RDC]

I am old at this but understanding it well would be new.

I have recieved an analysis for a data set that shows a nugget value tht is higher than the sill. Does this mean the data set is flawed or is it something virtually everyone forgets to mention?