Archeological sites are delicate, limited resources.
We can't replace them. Many professionals believe that the last undisturbed archeological sites in Texas may be destroyed in the very near future. If everyone carried away a bit of an ancient site or simply rearranged it slightly at its present location, we would soon have nothing of value left. Any disturbance of an archeological site may hinder future scientific studies. We are trying to manage special kinds of parks where the property will be held in trust long after you and I are gone from the scene.