Reports

Chemical Weathering in Central Iceland: An Analog of Pre-Silurian Weathering

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Science  25 Jul 1969:
Vol. 165, Issue 3891, pp. 391-392
DOI: 10.1126/science.165.3891.391

Abstract

The rate of chemical weathering in central Iceland is two to three times more rapid in areas with plant cover than in barren areas. This relatively small difference in chemical weathering rates suggests that atmospheric CO2, pressures no greater than five times the present value were needed to sustain present-day rates of chemical weathering before the development of higher land plants in the Silurian.