crop out
Học thuậtThân thiện
Definition
Verb: - To appear or become exposed at the surface of the earth. This term is primarily used in geology to describe a rock layer, mineral vein, or other geological feature that becomes visible on the surface after being covered.
Usage
The verb "crop out" is intransitive and is used to describe the natural, passive exposure of a geological formation. It is often used in the present or past tense to state a fact about a landscape.
Examples
- Verb:
- The ancient granite bedrock crops out along the riverbank.
- A layer of sandstone cropped out on the hillside, revealing the area's history.
- Geologists study where different rock types crop out to map the subsurface.
Advanced Usage
- "to crop out": This is the standard phrasal verb form. The related noun form for the exposed feature itself is an outcrop.
- We examined the quartz that had cropped out near the trail. The outcrop was about three meters high.
Variants and Related Words
- Outcrop (n): The actual portion of a rock formation that is visible at the surface.
- The limestone outcrop was full of fossils.
- Basset (v): A synonym used chiefly in British English, especially in mining contexts, meaning the same as "crop out."
- The coal seam bassets along the valley floor.
Synonyms
- Appear at the surface: A more general descriptive phrase.
- Be exposed: Indicates visibility after being covered.
- Protrude: To extend outward, often used for features that stick out.
Related Phrasal Verbs
- Crop up: To appear or happen unexpectedly (used for events or issues, not geological features).
- A few problems cropped up during the project. (Note: This is different from "crop out.")
Related Idioms
No specific idioms are commonly associated with the geological term "crop out."
Verb
- appear at the surface
- A seam of coal bassets