Maria is a geologist studying a particular rock layer in a local mountain range. one of her colleagues had previously discovered an uncommon dinosaur fossil in the same rock layer. maria uses the known age of the fossil to determine the age of the rock layer she is studying. what dating method is maria using?

The map above shows where people live in the united states. areas that are darker blue are areas where people live close together. areas that are lighter colors are places where people live farther apart. as a geographer, if you were to study where people live and why they choose to live in these places, which of the six essential elements of geography would you be using?