No crater because of the mile high glacier but plenty of crescent shaped sand piled up on the back side of the melted ice from the impact.
Anytime you are in New England, comet samples will be there for you.
It's on you.
You are in a very small minority that hold a belief based on no actual evidence - the scatter pattern of a comet strike during that period centers in Canada not NE.
Been in NE for years a long time back. Samples are not from that time nor all of them comet debris.
Its not a question of belief but of actual documented evidence for which there is none for NE, but almost overwhelming for mid-Canada Ice Cap strike.