206. Inclined extinction is shown by: A Calcite B. Basal section of augite C. Basal section of hornblende D. None of the above (BHU-2010)
How to solve this type of Q in which sections and category of extinction is related?? I have encountered in theory that Extinction angle measured on a specific mineral in thin section or grain mount depends exactly on grain orientation!! PLEASE CLARIFY ALL THESE confusion of HOW section of minerals RELATED TO EXTINCTION!