In reply to Adam Miller.

LIkely not. But we won't know until we remove the asphalt :-)

Some time ago there was an interesting story in Brooklyn where some workers were removing loose asphalt before a street was repaved. After a while they'd noticed that about half the old cobbles were exposed and were in quite good condition. Some neighbors noticed it as well and pushed to have the old asphalt all removed. It's a low traffic enough street that it worked.