Final answer:
Raised beaches are indicative of an emergent coastline, not submergent. They occur when sea levels drop or land rises, exposing previously submerged areas, which is opposite to the characteristics of a submergent coastline.
Step-by-step explanation:
The feature that is not characteristic of a submergent coastline is raised beaches. Submergent coastlines typically feature landforms such as rias, fjords, and barrier islands, which are associated with areas where water levels have risen, either due to melting ice caps or land subsidence. Raised beaches, however, indicate a drop in sea levels or uplift of the land. In other words, they are evidence of an emergent coastline, where previously submerged areas are exposed as the sea retreats.