a group of salty turquoise lakes
... that structures which helped create oxygen in the atmosphere today persist in a group of salty turquoise lakes?
... that <a href="./Stromatolite" id="mwBfw" rel="mw:WikiLink" title="Stromatolite">structures</a> which helped create oxygen in the atmosphere today persist in <b id="mwBf0"><a href="./Ojos_de_Mar" id="mwBf4" rel="mw:WikiLink" title="Ojos de Mar">a group of salty turquoise lakes</a></b>?