Rich In: Standard Pattern
Rich In: Standard Pattern records a directly documented English construction and keeps guidance bounded to the evidenced pattern rather than inventing a broader prohibition.
Use “rich in” when something contains a large amount of a substance, resource, quality, or other valued element.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| contain a large amount of a substance or resource | rich in + noun | Use “in” to introduce what is abundant. |
| contain a large amount of a quality or feature | rich in + noun | The construction also works for non-material qualities where the documented sense fits. |
| infer that every “rich + preposition” combination has the same meaning | do not | Keep the choice tied to the abundance/content sense documented for “rich in.” |
Quick tests
Meaning / construction test
Do you mean that something contains or possesses a large amount of the thing named next?
If yes: Use “rich in.”
If no: If “rich” has a different sense, choose the construction for that sense rather than changing the preposition mechanically.
Examples
The soil is rich in minerals.
“In” introduces the substance present in large amounts.
The archive is rich in local detail.
The complement names a quality or feature found abundantly in the archive.
This food is rich in protein.
The construction identifies a component present in a large amount.
Further guidance
Construction
Use “rich in” when something contains a large amount of a substance, resource, quality, or other valued element.
Style Boundary
“Rich” has other senses, including wealth and intensity, so “in” is not required whenever the adjective appears.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- RICH | English meaning — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Direct dictionary evidence for “rich in” when something contains much of a substance, quality, or resource.