As I guessed on a post yesterday, it looks like a maar. A maar is a broad, low-relief volcanic crater that is caused by a phreatomagmatic eruption, which is an explosion caused by groundwater coming into contact with hot lava or magma. To quote wiki. There are lots of these in Alaska and Kamchatka.
And,,,, as I said yesterday, it appears to have a Tuff ring. I agree with you!
Missed your post. That makes sense.
Yeah, that was my guess too, given the area. Most people don’t realize how weird geology can get...