Ancient Plant Fossil Unlocks Secrets of Damodar Basin’s Past

In a breakthrough that bridges paleobotany and geology, scientists have announced the discovery of what is believed to be the first-ever juvenile male cone of Glossopteris in the Damodar Basin. The fossil, described as a long-missing piece in understanding these extinct seed ferns, offers valuable clues about how some of Earth’s earliest tree-like plants reproduced during the Permian period.

The discovery is considered highly significant because male reproductive structures of Glossopteris have rarely been preserved, leaving gaps in scientific knowledge for decades. Researchers say the newly identified specimen could help refine theories about the biology and evolution of these ancient plants, which once dominated large parts of the southern supercontinent Gondwana.

Alongside the fossil find, microscopic analysis of coal and shale samples from the study area revealed unexpected geological evidence. Scientists observed framboidal pyrite — tiny raspberry-shaped mineral clusters — coupled with unusually high sulphur levels. Such features typically form in low-oxygen, saline or brackish-water environments, suggesting that seawater may have once entered the basin.

To further investigate these anomalies, researchers conducted chemical studies of preserved organic molecules using Gas Chromatography–Mass Spectrometry (GC–MS). The results indicated that a marine incursion likely occurred between 280 and 290 million years ago. The study also proposes a possible route by which the Permian Sea advanced from Northeast India into Central India.

The findings, published in the International Journal of Coal Geology, shed new light on the sedimentation history and paleoenvironment of the coal-bearing formations at the Ashoka Coal Mine in the North Karanpura Coalfield. Experts believe the research enhances understanding of how ancient seas influenced India’s geological evolution.

Importantly, the study highlights broader environmental implications. By comparing prehistoric marine incursions with modern sea-level rise linked to climate change and polar ice melt, scientists suggest that lessons from deep time may offer perspective on how future marine transgressions could impact continental landscapes.