Across
- 2. : A fine grained igneous rock of mafic composition.
- 3. : An abundant coarse grained igneous rock composed of of about 10 to 20 percent quartz and 50 percent potassium feldspar. It is used as a building material.
- 4. : A rock formed by the crystallization of molten magma.
- 6. : A texture of igneous rocks in which the crystals are too small for individual minerals to be distinguished with the unaided eye.
- 8. : The process of generating more then one rock type form a single magma.
- 10. : igneous rock formed when Magma solidifies at Earths surface. It is also known as volcanic rock.
- 11. : Igneous rock that formed below Earths surface. It is also known as plutonic rock.
- 13. : A light colored, glassy vesicular rock commonly having a granite composition .
- 15. : An igneous rock texture in which the crystals are roughly equal in size and large enough that individual minerals can be identified with the unaided eye .
- 16. fragmental texture : An igneous rock texture resulting from the consolidation of individual rock fragments that are ejected during a violent volcanic eruption.
- 18. : In an igneous rock with a porphrytic texture, a conspicuously large crystal embedded in a matrix of finer grained crystals called the ground mass.
- 20. : A concept proposed by N.L. Bowen that illustrates the relationships between magma and the minerals crystallizing from it during the formation of igneous rocks.
- 22. : A compositional group of igneous rocks that indicate a rock is composed almost entirely of light colored silicates. It is also known as granite composition.
- 23. : The fine grained equivalent of the igneous rock granite , composed mainly of light colored silicates.
- 24. : The size, shape, and distribution of particles that collectively constitute a rock.
Down
- 1. : A compositional group of igneous rocks that indicate rocks are contains substantial dark silicate minerals and calcium rich plagioclase feldspar. It is also known as basaltic composition.
- 3. A dark green to black intrusive igneous rock composed of dark silicate minerals. It makes up a significant percentage of oceanic crust.
- 5. : magma that reaches earths surface .
- 7. : A compositional group of igneous rocks that contains at least 25 percent dark silicate minerals. The other dominant mineral is plagioclase feldspar.
- 9. : A body of molten rock found at depth in lauding any dissolved gases and crystals.
- 12. : An igneous texture consisting of large crystals embedded in matrix of much smaller crystals.
- 14. : During the crystallization of magma, the settling of the earlier formed minerals that are denser than the liquid portion to the bottom of the magma chamber.
- 17. : A term applied to igneous rocks that contain small cavities called vesicles which are formed when gases escape from lava.
- 19. : A volcanic glass of felsic composition
- 21. : A gray fine grained igneous rock primarily of volcanic Origen and commonly exhibiting a porphrytic texture.