11. Horst and graben structures indicate tensional forces and crustal stretching. 12. The helium isotopic pattern was consistent with a radiogenic, crustal origin. 13. These and neighbouring shoshonitic centres are formed from magmas with crustal contamination. 14. The scientific objective is to monitor crustal deformation in tectonically active areas. 15. The resulting increase in crustal volume raised the elevation about one mile. 16. The Internal Betics or Alboran Crustal Domain are found along the coast. 17. In addition, it contains several crustal xenoliths including limestone and granite. 18. The crustal movement in the city is active and earthquakes are frequent. 19. This crustal boundary is the Great Lakes tectonic zone ( GLTZ ). 20. The North Andean convergent margin is a region of large crustal deformation.
