<p>Rock wearing a cap of lichen. Rock is in wetland where a person in orange vest bends over</p>
<p>Shallow wetland in Yellowstone's Northern Range. The lichen line on the boulder marks the elevation of high water</p>
NPS
Taken on 26 June 2020
<a rel="nofollow" class="external text" href="https://npgallery.nps.gov/">NPGallery</a>