Orcadian Basin
... that the Devonian Orcadian Basin once contained a lake estimated to be hundreds of kilometres across, forming distinctive sediments in which a diverse fauna of fossil fish has been found?
... that the <a href="./Devonian" id="mwC4U" rel="mw:WikiLink" title="Devonian">Devonian</a> <b id="mwC4Y"><a href="./Orcadian_Basin" id="mwC4c" rel="mw:WikiLink" title="Orcadian Basin">Orcadian Basin</a></b> once contained a lake estimated to be hundreds of kilometres across, forming distinctive <a href="./Sedimentary_rock" id="mwC4g" rel="mw:WikiLink" title="Sedimentary rock">sediments</a> <i id="mwC4k">(pictured)</i> in which a diverse fauna of fossil fish has been found?