siltstone: meaning, definition, pronunciation and examples
LowAcademic/Technical
Quick answer
What does “siltstone” mean?
A sedimentary rock composed primarily of silt-sized particles.
Audio
Pronunciation
Definition
Meaning and Definition
A sedimentary rock composed primarily of silt-sized particles.
A fine-grained clastic sedimentary rock which is intermediate between mudstone and sandstone, formed from compacted and lithified silt.
Dialectal Variation
British vs American Usage
Differences
No major lexical differences. Spelling conventions (e.g., 'lithified' not 'lithifyed') apply but are not specific to the word itself.
Connotations
Identical technical connotations in geology.
Frequency
Equally rare in general usage, used with identical frequency in geological contexts in both regions.
Grammar
How to Use “siltstone” in a Sentence
The siltstone contains [mineral/inclusion]The [formation/unit] is composed of siltstoneSiltstone interbedded with [sandstone/shale]Vocabulary
Collocations
Examples
Examples of “siltstone” in a Sentence
adjective
British English
- The siltstone layer was clearly visible.
- They conducted a siltstone analysis.
American English
- The siltstone layer was clearly visible.
- They performed a siltstone analysis.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Exclusively used in geology, earth sciences, and archaeology contexts to describe rock types and formations.
Everyday
Extremely rare. Would likely only be used when discussing geology as a hobby or visiting specific landscapes.
Technical
Core term in geological surveys, petroleum geology (as a possible reservoir seal), and engineering geology (assessing rock strength).
Watch out
Common Mistakes When Using “siltstone”
- Confusing it with sandstone or mudstone. Using it as a general term for any grey rock. Mispronouncing as 'sɪlɪt.stoʊn'.
- Incorrectly using it as a verb (e.g., 'The sediment siltstoned').
FAQ
Frequently Asked Questions
No. Shale is a fissile mudstone (breaks into thin layers). Siltstone is non-fissile and composed of slightly larger silt particles.
Yes, fossils can be preserved in siltstone, especially where conditions were calm, allowing delicate remains to be buried intact.
It generally has low porosity and permeability compared to sandstone, making it a poor aquifer or reservoir rock but a potential seal.
Particle size. Sandstone is made of sand-sized particles (0.0625–2 mm), while siltstone is made of silt-sized particles (0.004–0.0625 mm), making it finer-grained.
A sedimentary rock composed primarily of silt-sized particles.
Siltstone is usually academic/technical in register.
Siltstone: in British English it is pronounced /ˈsɪlt.stəʊn/, and in American English it is pronounced /ˈsɪlt.stoʊn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of SILT (the fine sediment) + STONE (rock). It's the stony, hardened version of silt.
Practice
Quiz
Siltstone is primarily classified based on: