
How is foliated metamorphic rock different from a non-foliated metamorphic rock?
Answer
478.5k+ views
Hint: Rocks are solid masses that are made up of minerals and mineraloid matter and there are three main categories of it based on the process of their formation— igneous, sedimentary and metamorphic. Rocks form the crust of the earth and both the upper and lower mantle. Metamorphic rocks, as the name suggests, are formed due to the process of metamorphism which entails changes in the minerals and geological texture of pre-existing rocks due to heat and pressure. Around 12% of the earth’s surface is made up of metamorphic rocks.
Complete answer: Although all foliated and nonfoliated metamorphic rocks are derived from igneous or sedimentary rocks, the process of recrystallisation makes them different. Foliated rock is formed as a result of unequal pressure is applied during recrystallisation while a non-foliated rock is formed when equal pressure is applied during the same. Foliated rocks break or separate into peels and thin layers and are made up of finer particles. On the other hand, non-foliated rocks have a granular appearance because they are made up of coarse grains. Examples of foliated rocks include slate, phyllite, schist, gneiss, etc and examples of non-foliated rocks include marble, quartzite, hornfels, anthracite coal, etc.
Note: Igneous rocks are made up of solidified lava and magma which may either penetrate existing rocks and crystallise or erupt during volcanic activity and cool down over time to form rocks. Sedimentary rocks are formed due to the accumulation of minerals and organic matter in layers on top of each other over time.
Complete answer: Although all foliated and nonfoliated metamorphic rocks are derived from igneous or sedimentary rocks, the process of recrystallisation makes them different. Foliated rock is formed as a result of unequal pressure is applied during recrystallisation while a non-foliated rock is formed when equal pressure is applied during the same. Foliated rocks break or separate into peels and thin layers and are made up of finer particles. On the other hand, non-foliated rocks have a granular appearance because they are made up of coarse grains. Examples of foliated rocks include slate, phyllite, schist, gneiss, etc and examples of non-foliated rocks include marble, quartzite, hornfels, anthracite coal, etc.
Note: Igneous rocks are made up of solidified lava and magma which may either penetrate existing rocks and crystallise or erupt during volcanic activity and cool down over time to form rocks. Sedimentary rocks are formed due to the accumulation of minerals and organic matter in layers on top of each other over time.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
Recently Updated Pages
Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 Social Science: Engaging Questions & Answers for Success

Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Physics: Engaging Questions & Answers for Success

Master Class 11 Biology: Engaging Questions & Answers for Success

Class 11 Question and Answer - Your Ultimate Solutions Guide

Trending doubts
How much is 23 kg in pounds class 11 chemistry CBSE

What is the technique used to separate the components class 11 chemistry CBSE

Define hypogynous perigynous and epigynous flowers class 11 biology CBSE

How many moles and how many grams of NaCl are present class 11 chemistry CBSE

How do I get the molar mass of urea class 11 chemistry CBSE

Define least count of vernier callipers How do you class 11 physics CBSE
