Final answer:
The youngest rocks on a geologic map are generally found in regions associated with recent geological events, which can be identified by colors corresponding to the most recent time periods on the map's legend or by annotations indicating young geological formations.
Step-by-step explanation:
The location of the youngest rocks on a geologic map is typically associated with the most recent geological events, such as volcanic activity or sediment deposition. On the provided geologic map, if the youngest rocks are indicated by color coding (assuming the time scale with yellow as most recent, followed by green, blue, red), the youngest rocks would be found in areas marked with the color yellow. The geologic map may also include annotations or labels that provide specific ages or geological periods for the rocks. It is important to reference the map's legend or time scale to accurately determine the age of rocks at different locations. Regarding the information on geological ages like those of the Grenville Orogeny or localized formations, one must generally look for areas on the map that are associated with recent geological processes. These processes can be sedimentation in river deltas, recent volcanic layers, or areas of uplift that have exposed younger strata. When evaluating provinces for younger crustal rocks, one considers processes such as erosion that may reveal deeper, previously buried geological features.