Figure 4.   Coastal Geomorphology of Virgin Islands National Park. The colored shoreline represents the variations in coastal geomorphology within the park. The very high vulnerability geomorphology is mostly sand beaches or mangrove wetlands. High vulnerability geomorphology includes gravel or cobble-sized beaches or cliff-backed beaches. Moderate vulnerability geomorphology consists of alluvium or fringing reefs fronting low cliffs. Low vulnerability geomorphology includes medium cliffs and rock headlands.