In an earlier chapter, we learned about Latitude and Longitudeon topographic maps. Geologic maps also have latitude and longitude marked along the edges … See more

Some geologic maps include Contour Lines: the topographic map is essentially superimposed on top of the geologic map. For clarity, other geologic maps omit the topograph… See more

In a geologic map, each rock unit is given a unique color and symbol (Figure 3). This key is provided in the legend of the map. The rock units are organized … See more

We have already discussed The Geologic Time Scale in an earlier module (click on the link to review). However, this geologic time scale may be more useful for this exercise, b… See more

Geologic maps include strike and dip symbols showing the orientation and slope of rock beds, which we covered in an earlier lab (see Tilted Beds and Strike and Dip). Som… See more