File name: SaltMarshMud_England_JuliaGillen_12Feb2011_2000.jpg Original Resolution: 2000 × 1333 File Size: 1385 KB (MIME Type: image/jpeg) Date Published: September 29, 2022 Download file View image caption A channel through a salt marsh on the Lancashire coast of England reveals a thick layer of mud beneath a thin covering of plants. Photo by Julia Gillen. Used under a Creative Commons license.