Important scientific principles of excavation

If you were walking in the woods and came upon some bones, what would you need to do in order to preserve the scientific value of your discovery? What are some important scientific principles of excavation that you would need to follow? What type of anthropologists would you ask to help you to better analyze your discovery? What would be some important questions you would try to find out about these bones? What information could anthropologists provide about the bones and the life of the person or animal that they belong to? What ethical issues and laws should you think about before you begin your excavation and analysis?