MARUM Research Academy

Tidal Cycles and Fluvial-Marine Interactions in Archean Rocks

My research focuses on sedimentary environments and processes from the Archean eon, particularly within shallow marine quartzose sediments from the 3.2-billion-year-old Paleoarchean era. During this time, the Earth was vastly different from the conditions we know today, and even the Phanerozoic. There was no oxygen in the atmosphere, only primitive microscopic life forms existed, and plate tectonics had not yet developed. The Archean period also witnessed the first emergence of land masses, though their size remains a subject of debate.

A portion of one such Paleoarchean landmass is preserved in South Africa's Barberton Greenstone Belt. Within the Barberton Greenstone Belt, the Moodies Group contains exceptionally well-preserved sedimentary textures and structures, indicating fluvial to shallow-marine sedimentation.

By studying these sedimentary features, I aim to reconstruct the types of sedimentary environments that existed during the Paleoarchean, analyze the behavior of fluvial and shallow marine systems in a world without macroscopic life and a different atmospheric composition, explore if and how coastal areas were influenced by tides, and understand what these environments can reveal about the conditions that allowed the earliest life forms to spread