If you compare OCaml and Standard ML, which came before it, it seems like OCaml is a lot like SML but with some changed syntax for convenience, and imperative features syntax for featyres that were technically supported by SML but still awkward, and I think it's in those imperative parts where they most resemble Pascal and Algol. They added "begin" and "end" as keywords equivalent to parentheses, they added for loops, and classes, and changed array syntax to resemble other languages more (by using square brackets to indicate an array subscript).

http://adam.chlipala.net/mlcomp/