Podcast
Questions and Answers
What is one distinguishing feature of granite compared to basalt?
What is one distinguishing feature of granite compared to basalt?
- Granite primarily forms from underwater volcanic activity.
- Granite has a higher iron content.
- Granite is formed under higher pressure conditions.
- Granite typically has larger crystals. (correct)
In what type of geological environment is basalt typically formed?
In what type of geological environment is basalt typically formed?
- Subduction zones.
- In mountain ranges.
- Continental plate boundaries.
- At oceanic ridges. (correct)
What characteristic shape is associated with basalt formations under the sea?
What characteristic shape is associated with basalt formations under the sea?
- Columnar joints.
- Sheet structures.
- Pillow shape. (correct)
- Dome shape.
Which process describes how granite typically forms?
Which process describes how granite typically forms?
Which rock type would most likely be found at a subduction zone?
Which rock type would most likely be found at a subduction zone?
Flashcards
Granite
Granite
An igneous rock with a coarse-grained texture, typically composed of quartz, feldspar, and mica. It forms from the slow cooling and crystallization of magma deep within the Earth.
Basalt
Basalt
An igneous rock with fine-grained texture, typically composed of plagioclase feldspar, pyroxene, and olivine. It forms from the rapid cooling of lava on the Earth's surface.
Intrusive Igneous Rock
Intrusive Igneous Rock
Igneous rock formed when magma cools and crystallizes relatively slowly, allowing for the formation of large, visible crystals.
Extrusive Igneous Rock
Extrusive Igneous Rock
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Andesite
Andesite
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Study Notes
Applying Knowledge
- Two thin slices, one of granite and one of basalt, are presented for comparison.
Comparing Structures
- Granite and basalt are different rock types.
- Granite has large crystals, while basalt has smaller, more uniform crystals.
- The different textures reveal different formation processes.
Formation and Location
- Granite forms deep within the Earth.
- Basalt forms closer to the Earth's surface.
- Basalt forms underwater which explains its distinct pillow like structure.
Marine Rock
- The document shows a marine rock.
- The rock has a pillow shape.
- The rock formation occurs at specific locations within the Earth's crust.
Andean Rock
- The document shows an andesitic rock.
- The andesitic structure is explained.
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