Podcast
Questions and Answers
What is the characteristic feature of obsidian?
What is the characteristic feature of obsidian?
- Phaneritic texture
- Rich in olivine
- Vesicles
- Glassy texture (correct)
Which rock is considered the mafic counterpart of pumice?
Which rock is considered the mafic counterpart of pumice?
- Scoria (correct)
- Gabbro
- Basalt
- Obsidian
What is the main difference between gabbro and basalt in terms of mineral composition?
What is the main difference between gabbro and basalt in terms of mineral composition?
- Gabbro has aphanitic texture.
- Basalt has a glassy texture.
- Gabbro contains minor amounts of olivine & amphibole. (correct)
- Basalt forms at mid-oceanic ridges.
How do the crystal sizes of intrusive rocks compare to extrusive rocks?
How do the crystal sizes of intrusive rocks compare to extrusive rocks?
What process leads to the formation of vesicles in rocks like pumice?
What process leads to the formation of vesicles in rocks like pumice?
Which rock is an extrusive felsic rock formed from extremely rapid cooling?
Which rock is an extrusive felsic rock formed from extremely rapid cooling?
What is the main factor that determines the composition of magma?
What is the main factor that determines the composition of magma?
Which of the following is not a common sedimentary structure?
Which of the following is not a common sedimentary structure?
What is the primary driver of the formation of sedimentary rocks?
What is the primary driver of the formation of sedimentary rocks?
Which of the following is not a common igneous rock?
Which of the following is not a common igneous rock?
What is the main driver of the formation of metamorphic rocks?
What is the main driver of the formation of metamorphic rocks?
Which of the following is a common sedimentary structure that indicates the direction of water flow?
Which of the following is a common sedimentary structure that indicates the direction of water flow?
What is the main source of sediment for the formation of sedimentary rocks?
What is the main source of sediment for the formation of sedimentary rocks?
Which of the following processes is responsible for the formation of magma?
Which of the following processes is responsible for the formation of magma?
What differentiates extrusive igneous rocks from intrusive igneous rocks?
What differentiates extrusive igneous rocks from intrusive igneous rocks?
What is the role of volatiles in the formation of magma?
What is the role of volatiles in the formation of magma?
What type of boundary is typically associated with decompression melting?
What type of boundary is typically associated with decompression melting?
What is the major difference in the formation of sedimentary rocks and metamorphic rocks?
What is the major difference in the formation of sedimentary rocks and metamorphic rocks?
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