Erratum to: Arab J Geosci

DOI 10.1007/s12517-014-1595-4

Regrettably, the online version of this article contained an error. The family name of one of the authors was incorrect.

Ali Ismaila should be spelled as Ali Ismail. The name is now correctly presented in this article. In addition, Dr. Ismail’s corrected affiliation is given below.