Counting chronology and climate records with about 1000 annual layers of a Holocene stalagmite from the Water Cave in Liaoning Province, Chinaannual layers of a Holocene stalagmite from the Water Cave in Liaoning Province, China |
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Authors: | Juzhi Hou Ming Tan and Dongsheng Liu |
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Institution: | (1) Institute of Geology & Geophysics, Chinese Academy of Sciences, 100029 Beijing, China;(2) Institute of Earth Environment, Chinese Academy of Sciences, 710054 Xi’an, China |
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Abstract: | One active stalagmite from the Water Cave in Liaoning Province contains growth layers of three sizes. Based on thermal ionization
mass spectrometry 230Th dating, we found that middle size layers are annual layers, with each middle layer consisting of one narrow dark layer
and a wide bright layer. The small layers within middle layers are sub-annual layers and the large layers are multi-year layers.
Based on the layer-counting method, we established a high-resolution time scale for layer thickness. Our results reveal two
dramatic century-scale climate cycles over the past 1000 years in this region. |
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Keywords: | counting chronology annual layer Holocene stalagmite climate change |
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