If glossopteris fossils were found in antarctica what was the climate of this continent before

Glossopteris is a fossilized woody plant, generally tongue-shaped leaf with visible midribs, networking veins and are found to exist in the Permian-Triassic age.

           According to the research, glossopteris fossil flora used to grow in a subtropical climatic condition, indicating that the Antarctica initially was a warm place that supported plants like glossopteris to flourish. But, later it transformed into a much more colder climatic region.

        Thus, its an important fossil plant that provides evidences that all the continents were once together.

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