old red sandstone
LowTechnical (Geology), Academic, Scientific
Definition
Meaning
A geological formation of sedimentary rock dating from the Devonian period, characterised by its red colour.
The term can refer specifically to the rock formation found in Britain and parts of northwest Europe, or more broadly to similar Devonian-aged continental sedimentary deposits elsewhere. It is a key stratigraphic unit in geology.
Linguistics
Semantic Notes
This is a proper noun when referring to the specific geological formation (often capitalised: Old Red Sandstone). It functions as a compound noun. Its meaning is highly specific to geology and earth sciences.
Dialectal Variation
British vs American Usage
Differences
The term is identically used and understood in geological contexts in both varieties. British usage may refer more frequently to local UK outcrops (e.g., in Scotland, Wales).
Connotations
No significant difference. Purely technical/scientific.
Frequency
Equally low frequency in both varieties, confined to geological discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
The Old Red Sandstone [verb: underlies/contains/yields]...Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None specific to this term.”
Usage
Context Usage
Business
Rare; might occur in mining, quarrying, or construction materials contexts.
Academic
Primary context. Used in geology, earth science, palaeontology, and physical geography papers and textbooks.
Everyday
Very rare. Might be encountered in regional tourism guides for areas with notable geology.
Technical
The core context. Used by geologists, stratigraphers, and in geological surveys.
Examples
By Part of Speech
adjective
British English
- The old red sandstone cliffs are a distinctive feature of the coastline.
American English
- They studied an old-red-sandstone outcrop for fossils.
Examples
By CEFR Level
- This rock is very old and red.
- We visited a quarry where they dig up old red sandstone.
- The Old Red Sandstone formation contains important fossils from the Devonian period.
- The depositional environment of the Old Red Sandstone suggests a predominantly fluvial and lacustrine setting, contrasting with the marine facies of the contemporaneous period elsewhere.
Learning
Memory Aids
Mnemonic
OLD rocks that are RED and made of SANDSTONE. Think of a very old, red brick building—this is the natural rock version from the Devonian 'age of fishes'.
Conceptual Metaphor
A historical archive (the rock layers record ancient environments).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating word-for-word as 'старый красный песчаник' in a non-geological context, as it is a proper geological term. In technical texts, the established term 'древний красный песчаник' or 'ордовикский красный песчаник' (context-dependent) should be used.
Common Mistakes
- Using lower case ('old red sandstone') when it is a formal stratigraphic name (should be capitalised: Old Red Sandstone).
- Confusing it with the New Red Sandstone (a younger, Triassic formation).
- Using it as a general descriptor for any old, red sandstone.
Practice
Quiz
The Old Red Sandstone is primarily associated with which geological period?
FAQ
Frequently Asked Questions
Yes, when referring to the specific geological formation as a proper name, it is conventionally capitalised: the Old Red Sandstone.
No, it is a specific stratigraphic term. Using it for any old, red sandstone is technically incorrect in geology.
It is extensively exposed in the British Isles (especially Scotland, Wales, and parts of England), Norway, and some areas of northeastern North America.
The Old Red Sandstone is Devonian in age (~420-360 million years old), deposited in continental settings. The New Red Sandstone is younger, from the Permian and Triassic periods (~300-200 million years old).