thể nấm
Definition
- Noun (Geology):
- Laccolith: A geological formation where a body of intrusive igneous rock (magma) has been injected between two layers of sedimentary rock, forcing the overlying strata upward into a dome or mushroom-like shape. The Vietnamese term "thể nấm" literally means "mushroom-shaped body," describing this characteristic form.
Usage Examples
- Noun:
- Các nhà địa chất học phát hiện một thể nấm lớn trong khu vực. (Geologists discovered a large laccolith in the area.)
- Núi này được hình thành từ một thể nấm cổ đại. (This mountain was formed from an ancient laccolith.)
Advanced Usage
- The term is highly specialized and used almost exclusively in geological contexts to describe this specific intrusive igneous structure.
Variants and Related Words
- Thể nấm lửa: A less common variant, literally "mushroom-shaped fiery body," also referring to a laccolith.
- Laccolite: An alternative English spelling for "laccolith," found in some older texts and directly corresponding to the French-derived definition.
Synonyms
- Laccolith: The standard English synonym.
- Igneous intrusion: A broader category of geological features that includes laccoliths.
Related Terms (Not Synonyms)
- Batholith: A very large igneous intrusion extending deep into the earth's crust.
- Sill: A tabular sheet of igneous rock that intrudes between older layers of rock horizontally.
- Dome (geological): A general term for an upwarped rock formation, which can be formed by a laccolith.