Ancient Marine Snail Discoveries in Gujarat: Insights into Prehistoric Life

Context: A collaborative team from IIT Bombay, ISI, and IISER Kolkata has discovered four new species of 20-million-year-old marine snails in the Dwarka Basin.

About the New Species of Ancient Marine Snail

• The fossils date back roughly 20 million years (Early Miocene, part of the Neogene Period).
• These fossils are “micro-fossils,” often smaller than 5 mm

Significance of the Discovery

Finding these specific filter-feeding snails allows geologists to reconstruct the ancient environment:

• Ocean Upwelling: Their presence proves the ancient Dwarka coastline experienced strong upwelling—a process where deep, cold, nutrient-rich water rises to the surface.
• Productivity: Such a high density of life suggests a highly productive marine ecosystem, similar to modern-day regions with rich fisheries.
• Global Warming Analog: These fossils act as “microscopic time capsules,” showing how marine life responded to natural periods of global warming in the deep past, long before human intervention.

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