| − | In [[Geology]], a '''bed''' is a layer of [[sediment]] or [[sedimentary rock]].<ref>http://wrgis.wr.usgs.gov/docs/parks/misc/glossaryb.html</ref> | + | In [[geology]], a '''bed''' is a layer of [[sediment]] or [[sedimentary rock]].<ref>http://wrgis.wr.usgs.gov/docs/parks/misc/glossaryb.html</ref> |