If you remove the distributed ledge, that's how blocks are stored.
The contents of the blocks of the Bitcoin blockchain (and other cryptocurrency blockchains) happen to be Merkle trees (of transactions, in Bitcoin's case). Blockchains as a data structure are unrelated to Merkle trees.
I legitimately don't understand what distinction you're trying to make here. Typically a "nit" clarifies something, but you're just muddying the discussion for seemingly no real benefit.
It is a basically set of Merkle trees, each with a header.