reed castreederitereedmergneritereefreef capreef complex or reef tract or reef tractreef core or reef flank or reef flankreef crestreef debris or reef detritus or reef detritusreef edgereef knolesreef knollreef limestonereef ring or atoll or atollreef segmentreef talusreef talusereef tractreef wall or wall reef or wall reefreefalreefoidreefyreentrantreentrant anglereentrant openingreevesiterefacereference axisreference ellipsoidreference levelreference localityreference managerreference planereference seismometerreference sourcereferencingrefikitereflected infraredreflected wavereflection coefficientreflection planereflection pleochroism or bireflectance or bireflectancereflection profilereflection spectrumreflection twin or twin or twinreflectometer or tiltmeter or tiltmeterrefoldrefolding or fold or foldreformatrefracted cleavage or cleavage or cleavage