Other contributors have said "Do geologic maps use color to indicate the different ages of rock?" is the same question as "What are Geologic maps?" If you believe that these are not asking the same thing and should be answered differently, click here
Geological maps show the distribution of geological features, such as rock types and faults. They are general overlaid with a base map, which is like a normal map, so as to help you understand where the features are located.
Topographic maps show topography. Topography is the height and dimensions of a land mass above water, conversely bythmetery is know as water topography. Geologic maps show geological feature of a...