Questions and Answers
What is a Mudstone?
What differentiates Wackestone from other classifications?
What type of rock is Packstone?
Which of the following describes Grainstone?
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What is a key characteristic of Floatstone?
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Rudstone is classified as which type of rock?
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What is the classification of Bafflestone?
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Which term refers to an autochthonous rock formed by organisms that encrust and bind?
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What is the characteristic of Framestone?
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Study Notes
Mudstone
- Allochthonous sedimentary rock
- Contains less than 10% of components larger than 2 mm
- Composed primarily of lime mud
- Mud supported, indicating a matrix of fine particles
- Contains less than 10% grains within the 0.3-2 mm size range
Wackestone
- Allochthonous sedimentary rock
- Similar to mudstone with less than 10% of components larger than 2 mm
- Contains lime mud
- Mud supported but with greater than 10% grains present
Packstone
- Allochthonous sedimentary rock
- Contains less than 10% of components larger than 2 mm
- Composed of lime mud
- Grain supported, meaning grains are more prominent compared to the mud matrix
Grainstone
- Allochthonous sedimentary rock
- Contains less than 10% of components larger than 2 mm
- Does not contain lime mud, distinguishing it from packstone and wackestone
- Grain supported, suggesting an abundance of grains
Floatstone
- Allochthonous sedimentary rock
- Contains greater than 10% of components larger than 2 mm
- Matrix supported, where the larger components are embedded in a finer-grained matrix
Rudstone
- Allochthonous sedimentary rock
- Contains greater than 10% of components larger than 2 mm
- Component supported, indicating that larger fragments contribute significantly to the structure
Bafflestone
- Autochthonous sedimentary rock
- Formed by organisms that act as baffles, influencing sediment accumulation and distribution
Bindstone
- Autochthonous sedimentary rock
- Created by organisms that encrust and bind sediments together
Framestone
- Autochthonous sedimentary rock
- Formed by organisms that build a rigid framework, serving as a structural foundation in marine environments
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Description
Test your knowledge of Dunham's classification of sedimentary rocks with these flashcards. Each card features key terms such as Mudstone, Wackestone, and Packstone, along with their definitions. Perfect for geology students seeking to master this important classification system.
