This pile of xenoliths was collected during field work at the Joya de los Contreras maar. The Santo Domingo maars are the source of mantle-derived spinel-lherzolite xenoliths and deep-crustal granulite xenoliths. The light-colored areas on the rims of the xenoliths are a coating of caliche. The scale at the lower right marks 10 cm on the left side.

Photo by Jim Luhr, 1991 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Santo Domingo Volcanic Field