Thrust tectonics or contractional tectonics is concerned with the structures formed by, and the tectonic processes associated with, the shortening and thickening of the crust or lithosphere. It is one of the three main types of tectonic regime, the others being extensional tectonics and strike-slip tectonics. These match the three types of plate boundary, convergent (thrust), divergent (extensional) and transform (strike-slip). There are two main types of thrust tectonics, thin-skinned and thick-skinned, depending on whether or not basement rocks are involved in the deformation. The principle geological environments where thrust tectonics is observed are zones of continental collision, restraining bends on strike-slip faults and as part of detached fault systems on some passive margins.[1]
- ^ Butler, R.; Bond, C. (2020). "Chapter 9 – Thrust systems and contractional tectonics". In Scarselli, N.; Adam, J.; Chiarella, D. (eds.). Principles of Geologic Analysis. Regional Geology and Tectonics. Vol. 1 (2 ed.). Elsevier. pp. 149–167. doi:10.1016/B978-0-444-64134-2.00008-0. ISBN 9780444641359.