It is all about igneous rock. Its description, classification, texture and others are included which is very important for studying Geology and Petrology. It is the overall concept of Igneous Rock.

4. Igneous Rocks
Igneous rock-
Igneous means "fire-formed“.

10. Flow beneath
the surface.
Flow on the
surface.

12. • Generally hard
• Massive
• Compact
• Usually contain much Feldspar & Silica
• Texture Crystalline or Glassy
• Entire absence of fossils
• Absence of a bedding fossil

20. -Sheet like plutons that form parallel to existing rock
Sill

21. Concordant bodies
Laccolith
-a mushroom-shaped mass

22. Lapolith
-Relatively small concordant body
-An inverted mashroom/ spoon shaped

23. -a tabular intrusion that cuts across preexisting rocks

24. Largest intrusive body that form when many plutons join
to form a huge expanse of rock.
– smaller bodies are termed stocks.

29. Phenocryst
Groundmass

32. Vesicular texture: (Volcanic Rock)
-Vesicles (Pores, Holes ,Cavities)
-it contain rounded holes (vesicles)
- forms due to escape of gas bubbles during cooling of lava.
- Example: Pumice

33. Pegmatitic Texture:
-Forms veins or layers within plutonic body
-Extremely coarse grained (most crystals >5 cm)
-Due to late stages of crystallization of granitic
magmas
-Formed when magma cools very slowly at depth

39. ThankYou.