1. Which are these hills of igneous rocks?

2. These formed hard igneous rocks which have resisted erosion.

3. Figure 3-17 shows graphically the division of igneous rocks according to their mineral content and their grain size.

4. Though igneous rocks are not layered, as sediments are, they too have characteristics that place them in time.

5. In the same way, the earmarks of igneous rocks are their mineralogy, textures, and structures.

6. Granulites are like their textural equivalents, granular igneous rocks, in being mosaics of interlocking crystals of roughly equal size.

7. In describing the physical properties of igneous rocks and the minerals that compose them, their texture and acidity were mentioned.

8. Trap rock is a form of plutonic igneous rock.

9. It and OMEGA have revealed a diversity of igneous rock compositions that rivals Earth's.

10. Igneous rock is rock formed by solidification from a molten state; especially from molten magma.

11. The igneous rock kimberlite sets off a yellow diamond from South Africa, a country known for its diamond mines.

12. Igneous Rock , rock formed when molten or partially molten material, called magma, cools and solidifies.

13. A coarse-grained, plutonic or intrusive igneous rock of felsic composition having large crystals of quartz, feldspar and mica.

14. A usually coarse - grained igneous rock composed chiefly of calcic plagioclase and pyroxene.

15. Wager and co-workers were struck by the strong resemblance of layered igneous rocks in the Skaergaard intrusion to clastic sedimentary rocks.

16. Extensive areas within continental platforms are formed of basement, a complex of metamorphic and igneous rocks of Palaeozic or Precambrian age.

17. At a later time, according to Hutton, subterranean heat may produce an intrusion of igneous rock.

18. Many of these materials are what we would call igneous rocks if we were to find them on Earth.

19. Therefore, in Yingmaili area of Tarim basin, the seismic attributes parsing technique is studied to recognize the igneous rock through using 3D seismic data.

20. But the complex of anisotropy and difficulty of exploration of igneous rock reservoir far exceeds others.

21. Clay minerals distribute extensively in various slopes made of sedimentary rock, weathering profiles of igneous rock, metamorphic rock and sedimentary rock and colluvial deposits.

22. The undissolved potassium mineral deposits is mainly classified to the sedimentary rock and the igneous rock.

23. The molten rock in the Earth that can either rise to the surface as lava and form extrusive igneous rock or cool within the Earth to form plutonic igneous rock.

24. Speaking of volcanoes , man, are they a violent igneous rock formation!

25. Furthermore, the lunar orbiters confirmed that the highlands of the moon are dominated by anorthosite, an igneous rock composed primarily of the mineral feldspar and rich in calcium and aluminum.

26. Well Da 72 is a high yield well after acidizing treatment in igneous rock of Es 3.

27. Its crystalline structure formed inside a bubble of volcanic gas as igneous rock cooled.