The welfare state is a concept of government in which the state
plays a key role in the protection and promotion of the social and
economic well-being of its citizens. It is based on the principles of equality of opportunity, equitable distribution of wealth,
and public responsibility for those unable to avail themselves of the
minimal provisions for a good life. The general term may cover a variety
of forms of economic and social organization.
One way to get extra information that might help you determine the relative ages of these rocks is to examine any fossils contained in the layers. The time period that these fossils appear might be known, and this could help you begin to sort out which rock layers are older than others.