Schematic scenario for flood basalt eruptions at the Triassic-Jurassic boundary (IMAGE)
Caption
Schematic scenario for flood basalt eruptions at the Triassic-Jurassic boundary. Magma intruded into shales, coal beds and organic-rich sediments, releasing vast amounts of carbon dioxide and other pollutants, including Hg. Middle: examples of normal and malformed spores. Picture on the right: Phlebopteris. The fern fossil is from a quarry in Southern Germany (Pechgraben) from the earliest Jurassic. This location and is also known to contain aberrant fern spores. These small ferns were common in the direct aftermath of the extinction event. The fern spores are from the Schandelah-1 core. These types of spores were produced by Phlebopteris.
Credit
Fern fossil (10 by 10 cm) - Photo credit: Han van Konijnenburg-van Cittert Fern spores (spores are 40 – 60 micrometers in size) – Photo credit: Remco Bos
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