1. Earthquakes leave scars in the earth's crust.

2. Minerals occur naturally in the earth's crust.

3. Deep internal forces cause movements of the earth's crust.

4. The movements set up stresses in the earth's crust.

5. Deep in the earth's crust the rock may be subjected to temperatures high enough to melt it.

6. They occur in areas where the Earth's crust is subjected to tensional forces,(sentencedict .com) trying to pull it apart.

7. But they are present in the Earth's crust in low concentrations.

8. He studied the faulting of the earth's crust.

9. Strains in the Earth's crust seem to pile up.

10. The earth's crust is layered.

11. Earth's crust is like an ice field floating atop the ocean.

12. A sedimentary basin is an area of the earth's crust that is underlain by a thick sequence of sedimentary rocks.

13. Iodine, a purplish-brown element that is rare in Earth's crust but common in seawater, is essential for all life.

14. The earth's crust is between 5 and 25 miles thick.

15. This earthquake was caused by diastrophism of the earth's crust.

16. Lake Baikal is the earth's crust or water deep rift formed.

17. Earth quakes can result from stresses in the earth's crust.

18. Silicon and oxygen are the fundamental constituents of rocks in the earth's crust.

19. Scientists have put together a composite picture of what the Earth's crust is like.

20. The hole they drilled pierces 6 km into the earth's crust.

21. About a dozen large rigid plates make up the Earth's crust.

22. They effectively mark the bottom of the storage space for water in the Earth's crust.

23. We were barely twenty when we got married, back before the Earth's crust cooled.

24. The team suggests that a pulse of hot, solid rock rose from a hotspot beneath Iceland and travelled east beneath the Earth's crust.

25. Sodium is the sixth most abundant element in the earth's crust.

26. And this pressure forced the Earth's mantle, the layer of hot, plastic rock that's located beneath the Earth's crust, to give way and ooze out and sideways.

27. At the Galapagos Rift, volcanic activity beneath two geologic plates renews the earth's crust.

28. They will use the data to create a 3D computer model of how magma moves through the Earth's crust to make and break continents.

29. The Mediterranean is part of what geologists call a mobile belt — fragments of the Earth's crust that float between the much larger continental plates.

30. Stratigraphy studies the sequence of the rocks in the earth's crust.