At a divergent boundary between two pieces of oceanic crust, the geologic feature/event you would most likely find is the Mid-Ocean Ridge. Here's why:
1. **Mid-Ocean Ridge:** This underwater mountain range is formed at divergent boundaries where tectonic plates are moving apart. As the plates separate, magma rises from the mantle to fill the gap, creating new oceanic crust. The Mid-Ocean Ridge is a significant feature of divergent boundaries in oceanic crust regions.
Therefore, if you encounter a question about the geologic feature/event at a divergent boundary between two pieces of oceanic crust, the Mid-Ocean Ridge would be the most probable answer.
