ナショナルジオグラフィックのインスタグラム(natgeo) - 7月20日 07時51分

Photo by @shonephoto (Robbie Shone) // What can we learn from stalagmites? North Africa is sensitive to changes in climate, particularly in terms of rainfall patterns. We can tell from the shape of the stalagmite pictured here that rainfall has changed in this part of Tunisia in the past, causing the stalagmite to alter its character and show signs of regrowth.
We're following the work of a group of scientists from the Tunisian Geological Survey and European Research Institutions (UK, Germany, Austria and SISKA in Switzerland) who are looking at changes in rainfall patterns through time. Several of their field sites lie inside Djebel Serdj, which hosts some of the largest caves in Tunisia.

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