Columbia Plateau ecoregion
... that the basalt underlying the Columbia Plateau ecoregion in Washington and Oregon can be up to 2 miles (3 km) thick?
... that the <a href="./Basalt" id="mwB9Q" rel="mw:WikiLink" title="Basalt">basalt</a> underlying the <b id="mwB9U"><a href="./Columbia_Plateau_(ecoregion)" id="mwB9Y" rel="mw:WikiLink" title="Columbia Plateau (ecoregion)">Columbia Plateau ecoregion</a></b> in <a class="mw-disambig" href="./Washington" id="mwB9c" rel="mw:WikiLink" title="Washington">Washington</a> and <a href="./Oregon" id="mwB9g" rel="mw:WikiLink" title="Oregon">Oregon</a> can be up to <span about="#mwt25" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"2"},"2":{"wt":"mi"},"3":{"wt":"km"},"4":{"wt":"0"}},"i":0}}]}' id="mwB9k" typeof="mw:Transclusion">2 miles (3</span><span about="#mwt25" typeof="mw:Entity"> </span><span about="#mwt25">km)</span> thick?