Mathematics – Logic
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..95..291k&link_type=abstract
Earth and Planetary Science Letters, Volume 95, Issue 3-4, p. 291-296.
Mathematics
Logic
3
Scientific paper
The presence of a series of humus-rich layers, identified as paleosols in the loess sediments in the Kashmir basin in northwestern India indicate phases of climatic amelioration in the past. Stable carbon isotope ratios of the organic fraction of paleosols from three locations show that almost all the paleosols supported significant C4-type vegetation which is characteristic of water stressed and relatively hot, dry environments. Limited measurements of stable carbon isotope ratio in modern soils show an estimated C4-type vegetation contribution of less than 25%, which is tenable given the temperate climate of the basin today. In the light of some recently published TL (thermoluminiscence) dates for loess sedimentation in Kashmir, these findings suggest significant ecological changes most likely related to water stress and temperature there during the past 300 kyr (1 kyr = 1000 years).
Bhattacharya Somesh Kr.
Krishnamurthy R. V.
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