Lava ridges which are horseshoe-shaped in plan occur on the flanks of several volcanic cones in the La Mesa Basalts, Quaternary alkaline olivine basalts in south-central New Mexico. I propose to call these newly described features herradura (Spanish: horseshoe). They formed by extrusion of lava through an already existing sloping crust of lava.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview