10 Questions
Why is building on a shaley foundation not recommended?
Shale's fissility can lead to landslides when the rock becomes wet.
What is the main difference between phaneritic and porphyritic textures in rocks?
In phaneritic rocks, the groundmass and mineral grains have different sizes, while in porphyritic rocks they are almost the same.
What mineral composition is commonly found in shale?
Mainly contains silicate minerals like quartz and feldspars
Which type of rock shows foliation: sedimentary rock or metamorphic rock?
Metamorphic rock
How does the effervescence test with weak acid help identify rocks?
It indicates the presence of carbonate minerals in the rocks.
Which texture is characterized by large mineral grains contrasting with a fine-grained groundmass?
'Porphyritic' texture
What type of rock is slate?
Metamorphic rock
'Shale' is primarily composed of which group of minerals?
'Silicate minerals'
'Phaneritic' textures in rocks are mainly characterized by:
'Groundmass and mineral grains of similar size'
'Porphyritic' textures are distinguished by what feature?
'Different sizes of groundmass and mineral grains'
Test your knowledge of geological structures by identifying the differences between eroded synclines and anticlines. Also, understand the composition of silicate minerals and their basic building blocks. Explore these topics to enhance your understanding of geology.
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