Re: 2002 civic ex: Mystery gasket/seal
The usual suspects that would be leaking oil into that area are the front crank seal, front cam seal, valve cover gasket......and MAYBE the oil pan and gasket. Anything else would be unusual.
The oil pump is there too, but if the seal between the pump and block leaks it seems to end up on the sides of the block.
Remove the timing covers, clean everything off, reassemble just enough to run.... and watch for fresh leaks to form?