Fig. 4From: The quantification of physico-mechanical properties and durability of onyx-travertines from Santa Ana de los Ríos de Cuenca, Ecuadora Optical micrograph of YT sample, b SEM micrograph of aragonite canes, c Microchemical mapping showing strontium in aragonite crystal of YT sample, d SEM micrograph of strontianite crystal, and e EDS spectrum of strontianite crystalBack to article page