What is the proper name for a narrow channel that is cut into the bedrock by the sea?

When walking on a rocky coastline, sometimes you find yourself impeded by straight, narrow, deep channels 1-2 metres across, that occur as a result of softer rock being eroded much faster than the surrounding rock. If you were to fall into one of these channels you might find it difficult to get out ahead of an oncoming tide! I don't think the word "channel" is the proper word, and I would like to know the correct definition for it and a web-link if possible.

Answers:
It is definitely not a 'fjord', these are glacially eroded valleys that have been partially flooded by rising sea levels.

I think 'channel' officially is a stretch of water between two other bits, but terms can be used for more than 1 thing!

I've always called them 'sea clefts' or 'narrow inlets' but I don't know of an official term.
Gorge
a gorge
It's called a Gorge.
Fjord. Gorges are inland. A gorge (or canyon) is a deep valley carved by a river, whereas a fjord is a narrow inlet of the sea between 2 cliffs or steep slopes.
You description sounds like you have been falling into the remains of dykes. These are "walls" of igneous rocks, injected into the country rock by deep-seated magmatic activity. As you say, if they are softer than the country rock they leave a channel. They can ,of course, be harder, then they form a wall, which you have to climb over rather than fall in. I think the word you are loking for is probably channel or ditch or place where the dyke was!
i'am going to say it is called a canal
An inlet.
It would not be a fjiord beacuse 1) a fjiord HAS to be glacial and 2) A fjiord is an area of land that has been flooded, NOT due to erosion. The name you are looking for is an inlet!!!
a gorge
there is a wide channel in the usa called the grand canyon.
When walking on a rocky coastline, sometimes you find yourself impeded by straight, narrow, deep channels 1-2 metres across, that occur as a result of softer rock being eroded much faster than the surrounding rock. If you were to fall into one of these channels you might find it difficult to get out ahead of an oncoming tide! I don't think the word "channel" is the proper word, and I would like to know the correct definition for it and a web-link if possible.?
i dont know.
A gully
Maybe a narrow channel? I dont think there is a special name for everything in the World
In our area we would refer to them as Gillets.

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