**Author details**

Dereje Ayalew\* and Bekele Abebe School of Earth Sciences, Addis Ababa University, Addis Ababa, Ethiopia

\*Address all correspondence to: dereayal@yahoo.com; dereje.ayalew@aau.edu.et

© 2022 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
