Lixin Wang¹, Kudzai Farai Kaseke¹, Sujith Ravi², Wenzhe Jiao¹, Titus Shuuya³ and Gillian Maggs-Kölling³, (1)Indiana University Purdue University Indianapolis, Department of Earth Sciences, Indianapolis, IN, United States, (2)Temple University, Earth & Environmental Science, Philadelphia, PA, United States, (3)Gobabeb Research and Training Centre, Walvis bay, Namibia