1. Department of Environmental and Sustainability Sciences, Texas Christian University, Fort Worth, Texas, USA
2. Department of Geology, Chukwuemeka Odumegwu Ojukwu University, Uli, Anambra State, Nigeria
3. Department of Earth Sciences, Albert Ludwig University of Freiburg, Freiburg, Germany
4. Department of Physics, Air Force Institute of Technology, Kaduna, Nigeria