41. A class is extensional if and only if it is characterized solely by its membership. 42. Extensional tectonic activity followed the Laramide Orogeny and was accompanied by voluminous felsic volcanic eruptions.43. The volcanic material will contract as it cools, and this cooling generates extensional stresses. 44. After downwelling ends, a delamination event within the mantle produces extensional elements of tessera. 45. The sediments accumulated in the Abanico Extensional Basin within a context of the Andean orogeny. 46. There are three evolutionary models established including those driven by both compressive and extensional forces. 47. These basins were formed by extensional tectonics which were accompanied by an intermediate to acidic volcanism. 48. Here, the class is extensional . 49. The PTZ represents the transitional zone between the extensional and compressional environments along the Manila Trench. 50. The distinction between intensional and extensional entities is parallel to the distinction between sense and reference.
