Filón-capa can be translated into English as "vein-layer".
Meaning
The term "filón-capa" is commonly used in geology to refer to a layer of rock that contains a mineral deposit or ore, usually in the form of a vein. It is used more in written contexts, particularly in scientific texts and geological reports.
Examples
En esta región, los geólogos descubrieron un importante filón-capa de oro.
(In this region, geologists discovered an important gold vein-layer.)
El filón-capa de este yacimiento minero es uno de los más ricos de la zona.
(The vein-layer of this mining deposit is one of the richest in the area.)
Idiomatic Expressions
"Seguir el filón" (to follow a good lead):
Los detectives decidieron seguir el filón y finalmente resolvieron el caso.
(The detectives decided to follow the lead and finally solved the case.)
"Está en un filón" (to be on a winning streak):
Desde que comenzó el proyecto, nuestro equipo está en un filón de éxitos.
(Since the project started, our team is on a winning streak of successes.)
"Cerrar el filón" (to finish off something successfully):
Esta victoria nos permitió cerrar el filón de una temporada increíble.
(This victory allowed us to close the season off in an incredible way.)
Etymology
The term "filón-capa" is a compound word formed by "filón" (vein) and "capa" (layer). It comes from Latin roots, where "filum" means "thread" or "vein," and "cappa" means "layer" or "cloak."