Abstract
Three stalagmites were collected in the “Perolas” cave, 150 km NW of Cuiabà, Mato Grosso, Brazil, in order to reconstruct the climate history of the surrounding region. These stalagmites were similarly formed by stacking of thousands of calcitic pairs of laminae. Microphotographs of polished thin sections were used to count the laminae pairs and measure their width. A reasonable fit was found between the counting results and U/Th and 14C geochronological data, proving that these pairs are annually deposited; and correlations were also found between the annual growth rate of the stalagmites and the annual water excess in the Perolas region, proving that the former parameter could be used as a climatic proxy. Three files of climatic proxy data covering 256 years were thus obtained and statistically treated to restore the historical fluctuations of the climate. Apart from well-documented periodicities, a still poorly known but very strong half-century climatic oscillation appeared in the results.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
