blow hole
Cetacean breathing vent
A blow hole is an opening through which air or water escapes.
Whales and dolphins breathe through a blow hole on top of their heads.
In geology, a blow hole is a coastal rock formation where waves force water up through a vertical shaft, creating a geyser-like spray.
The term also applies to defects in metal castings where gas bubbles have left cavities.
- spoutProjecting pouring tube
- whaleHuge sea mammal
- sperm whaleGiant toothed marine mammal
- ventOpening for airflow
- volcanic ventMagma's surface exit
geyser · lava tube · spray · ocean spray · ocean · breathing · surface · mist · cetacean · humpback · exhale · cavity · opening · air · casting · mold · defect · sea
opening vs. solid/sealed (geological/industrial sense)
blow holesolid rock
Continuous, hard stone
plug · obstruction · blockage