As mentioned this discovery surprised a lot of people.  Here is a bit more information by an expert in the field:

Zvi Ben-Avraham, of Tel Aviv University, and Emanuele Lodolo of the National Institute of Oceanography and Experimental Geophysics in Trieste, Italy, wrote in the Journal of Archaeological Science: ‘There are no reasonable known natural processes that may produce these elements’.

The monolith was discovered 131ft (40 metres) below the waves on what was once an island called Pantelleria Vecchia Bank in the Sicilian Channel.

What do you think this was used for?  And do you think the civilization who built it had help or at the very least was way more technologically advanced than we give them credit for?

And this is a really interesting related video on underwater discoveries.

Keep an eye out for further updates on this recent monolith!

thanks to dailymail.co.uk for the great info

thanks to institute of the study of the ancient world for the pic