Sydney Mary Thompson
... that geologist Sydney Mary Thompson discovered a glacial erratic that redefined the westernmost extent of the Irish Sea Glacier?
... that geologist <b id="mwCcw"><a href="./Sydney_Mary_Thompson" id="mwCc0" rel="mw:WikiLink" title="Sydney Mary Thompson">Sydney Mary Thompson</a></b> discovered a <a href="./Glacial_erratic" id="mwCc4" rel="mw:WikiLink" title="Glacial erratic">glacial erratic</a> that redefined the westernmost extent of the <a href="./Irish_Sea_Glacier" id="mwCc8" rel="mw:WikiLink" title="Irish Sea Glacier">Irish Sea Glacier</a>?