Devonian Period

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A Devonian Period is a geologic period that spanned 60 million years from the end of the Silurian Period (419.2 ± 3.2 Mya) to the beginning of the Carboniferous Period (358.9 ± 0.4. Mya).



References

2018


2015

  • https://www.thegwpf.org/patrick-moore-should-we-celebrate-carbon-dioxide/
    • QUOTE: … The Devonian Period beginning 400 million years ago marked the culmination of the invasion of life onto the land. Plants evolved to produce lignin, which in combination with cellulose, created wood which in turn for the first time allowed plants to grow tall, in competition with each other for sunlight. As vast forests spread across the land living biomass increased by orders of magnitude, pulling down carbon as CO2 from the atmosphere to make wood. Lignin is very difficult to break down and no decomposer species possessed the enzymes to digest it. Trees died atop one another until they were 100 metres or more in depth. This was the making of the great coal beds around the world as this huge store of sequestered carbon continued to build for 90 million years. Then, fortunately for the future of life, white rot fungi evolved to produce the enzymes that can digest lignin and coincident with that the coal-making era came to an end. …