Jotnian
... that Jotnian sedimentary rocks are the oldest known sediments in the Baltic area that have not been subject to the geological process of metamorphism?
... that <b id="mwARc"><a href="./Jotnian" id="mwARg" rel="mw:WikiLink" title="Jotnian">Jotnian</a></b> sedimentary rocks are the oldest known sediments in the Baltic area that have not been subject to the <a href="./Geology" id="mwARk" rel="mw:WikiLink" title="Geology">geological</a> process of <a href="./Metamorphism" id="mwARo" rel="mw:WikiLink" title="Metamorphism">metamorphism</a>?