Question
Colour Index
The Color Index in petrology is a quantitative measure used to assess the mineral composition of igneous rocks based on their color. It is particularly relevant in classifying and identifying rocks, especially those of volcanic origin. The Color Index is expressed as the percentage of dark-colored minerals in a rock, primarily focusing ___ _______ ____ ______ _____________ _____.
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Describe any five primary structures found in sedimentary rocks.
Classification of igneous rocks
Discuss the megascopic and microscopic characters of gabbro with the help of neat well labelled diagrams.
Explain the crystallization behavior of SiO2 system.
Colour Index
Differentiate the following :
a) Importance of studying sedimentary rocks
b) Physical weathering
Describe the different types of textures found in metamorphic rocks with the help of neat well labelled diagrams.
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