Nodules: Discreet, hard in place, concentrations of Fe andor Mn
https://www.powershow.com/view/14ce2a-MDBkM/Nodules_Discreet_hard_in_place_concentrations_of_Fe_andor_Mn_powerpoint_ppt_presentation
Icons create by Freepik from www.flaticon.com/
Icons create by Freepik from www.flaticon.com/