arkose: meaning, definition, pronunciation and examples
RareAcademic/Technical
Quick answer
What does “arkose” mean?
A type of sandstone containing at least 25% feldspar grains.
Audio
Pronunciation
Definition
Meaning and Definition
A type of sandstone containing at least 25% feldspar grains.
A coarse-grained sedimentary rock, typically pinkish or reddish, formed from the erosion of granitic rocks and deposited in arid or high-energy environments. It is important in geology for interpreting past climates and tectonic settings.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage between British and American English. The term is used identically in geological literature worldwide.
Connotations
Purely technical, with no regional connotations.
Frequency
Extremely low frequency in general discourse, used exclusively within geology. No notable regional variation in frequency.
Grammar
How to Use “arkose” in a Sentence
The [geological unit/formation] is composed of arkose.Arkose is found in [specific location/environment].The sample was identified as arkose.Vocabulary
Collocations
Examples
Examples of “arkose” in a Sentence
adjective
British English
- The arkose sediments indicate a nearby granitic source.
American English
- The arkosic unit shows significant feldspar content.
Usage
Meaning in Context
Academic
Used in geology, earth science, petroleum engineering, and archaeology texts to describe rock formations and interpret depositional environments.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in petrology and sedimentology for rock classification and stratigraphic analysis.
Vocabulary
Synonyms of “arkose”
Neutral
Weak
Vocabulary
Antonyms of “arkose”
Watch out
Common Mistakes When Using “arkose”
- Pronouncing it as 'ar-KOZE' or 'ar-KOSE' (stress is on the first syllable).
- Using it as a general term for any sandstone.
- Misspelling as 'arcose' or 'arkos'.
FAQ
Frequently Asked Questions
No. Arkose is a specific type of sandstone rich in feldspar, whereas typical sandstone is dominated by quartz.
It indicates erosion from a granitic source rock and often suggests a dry climate or rapid erosion that prevented feldspar from breaking down completely.
Yes, for example, in the Triassic sandstones of the English Midlands and parts of Scotland.
Feldspar is chemically less stable than quartz. Its presence means the sediment was not transported far or weathered intensely, providing clues about the geological history.
A type of sandstone containing at least 25% feldspar grains.
Arkose is usually academic/technical in register.
Arkose: in British English it is pronounced /ˈɑːkəʊs/, and in American English it is pronounced /ˈɑːrkoʊs/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'ARK' (like Noah's Ark, made of wood/granite) + 'OSE' (sounds like 'oats' or 'grainy') = a grainy rock derived from granite.
Practice
Quiz
In which field is the term 'arkose' primarily used?