Seems fake to me. The “ribs” are much too round for ribs, for example, and the picture where they are preparing out part of the skeleton looks like a computer graphic. He says they look recent and “organic”, but in the picture it looks more like heavily fossilized bones.
I was not able to locate his alledged dissertation in the Leiden university library catalogue. Which is odd as they should have it when it is a Dutch dissertation (it is possible he wrote it at a foreign university though). Neither did I get any hit for the name Casper Shilling.
The rock face looks much to weathered to be a recent outcrop due to the earthquake in my opinion, unless it is of a very soft sedimentary kind. Also, the good condition of the “skeleton” is not what you expect for an earthquake-uncovered situation.
Some things do not make sense for someone alledgedly working in the field of archaeology. Talking about “radio-carbon dates” for example when it concerns outcrops and remains likely too old for that technique.
And all archaeology pictures on his website rather look like tourist pictures, not pictures by someone involved.
I vote for fake, possibly related to the viral campaign other post have been made on here in this forum and on Alex’ main site.