... describing, classifying and defining and the four different kinds of explanation including: sequential explanation, causal explanation, factorial explanation, and theoretical explanation have ... (1988) also maintains that genres ―give their users access to certain realms of social action and interaction, and certain realms of social influence and power‖ In order to achieve the main goals, ... VIETNAM NATIONAL UNIVERSITY, HANOI UNIVERSITY OF LANGUAGES AND INTERNATIONAL STUDIES DO KIM PHUONG AN INVESTIGATION INTO THE STRUCTURE AND MEANING OF GEOLOGICAL TEXTBOOKS AS A GENRE IN ENGLISH AND...