Evolution of staggered Oligocene-Miocene transgressions and molluskan faunas in eastern Patagonian basins

Key Points

• Molluskan faunas evolved significantly during staggered transgressions, showing notable diversity changes.
• Analysis indicates distinct ecological patterns between Oligocene and Miocene periods in sedimentary basins.
• The study utilizes fossil records to trace faunal shifts, linking them to transgressive events.
• Findings highlight the importance of transgressions in shaping biodiversity in ancient marine environments.