High-resolution records of rainfall events from clay bands in tufa

Akihiro Kano, Tatsuya Kawai, Jun Matsuoka, Takuji Ihara

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Individual rainfall events are recorded as thin clay bands in annually laminated, freshwater-carbonate tufa. Runoff from rainfall events entrains clay that then adheres to the tufa surface. A specimen collected from southwest Japan exhibits >100 clay bands formed during a 15 yr period from 1988 to 2002. The chronology of the clay bands was determined by using the temperature-dependent cycle of oxygen isotope ratios in the carbonate, and the clay content was quantified by electron-probe microanalysis Si X-ray strength. The obtained Si X-ray strength curve and actual rainfall record follow a nearly identical pattern. The clay content of each band correlates with rainfall amount. Rainfall of >50 mm/week produced sufficient amounts of suspended cave clay to produce clay bands in the tufa. Because the clay bands survive postdepositional alteration, this new method can be applied to ancient tufa deposits and has great potential as a high-resolution rainfall record for use in climate studies.

Original languageEnglish
Pages (from-to)793-796
Number of pages4
JournalGeology
Volume32
Issue number9
DOIs
Publication statusPublished - Sep 1 2004

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tufa
clay
rainfall
carbonate
oxygen isotope ratio
electron probe analysis
cave
chronology
runoff

All Science Journal Classification (ASJC) codes

  • Geology

Cite this

Kano, A., Kawai, T., Matsuoka, J., & Ihara, T. (2004). High-resolution records of rainfall events from clay bands in tufa. Geology, 32(9), 793-796. https://doi.org/10.1130/G20736.1

High-resolution records of rainfall events from clay bands in tufa. / Kano, Akihiro; Kawai, Tatsuya; Matsuoka, Jun; Ihara, Takuji.

In: Geology, Vol. 32, No. 9, 01.09.2004, p. 793-796.

Research output: Contribution to journalArticle

Kano, A, Kawai, T, Matsuoka, J & Ihara, T 2004, 'High-resolution records of rainfall events from clay bands in tufa', Geology, vol. 32, no. 9, pp. 793-796. https://doi.org/10.1130/G20736.1
Kano, Akihiro ; Kawai, Tatsuya ; Matsuoka, Jun ; Ihara, Takuji. / High-resolution records of rainfall events from clay bands in tufa. In: Geology. 2004 ; Vol. 32, No. 9. pp. 793-796.
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