What does brecciated mean?
Brecciated describes rock that has been crushed, fractured, or broken into angular fragments and then cemented together in a finer matrix. It is especially common in geology when describing fault zones, shattered rock masses, and the textures of breccias. The fragments in brecciated material retain sharp or irregular edges, a feature that distinguishes it from conglomerate, whose fragments have generally been rounded through abrasion or transport. The term may also convey the geological history of a formation: intense deformation followed by partial healing or deposition of mineral material in the broken spaces. Although “brecciated” is specialized, it is useful in geology, engineering geology, mining, and the study of fault-related ore deposits. It is not normally used for loose soil or ordinary rubble, which have not necessarily been cemented into rock.
adjectiveConsisting of or characterized by angular fragments of rock that have been broken from larger masses and subsequently cemented together in a finer matrix.
- Made of angular rock fragments produced by crushing, fracturing, or faulting and subsequently cemented together in a finer matrix.
"The fault zone contains brecciated granite surrounded by heavily altered host rock."
"Brecciated limestone forms a narrow band along the fault."
"The polished outcrop reveals brecciated rock with fragments of contrasting mineral composition."
Brecciated is rock with a broken history: its sharp-edged fragments preserve the violence of crushing, unlike the worn pebbles of a conglomerate.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does brecciated come from?
The English adjective “brecciated” was formed from “breccia” plus the suffix “-ated.” “Breccia” entered English in the early 17th century from Italian breccia, meaning rubble or broken material; the ultimate origin of the Italian term is uncertain. The geological adjective developed to describe rock composed of the angular fragments represented by a breccia.
Related word forms
How brecciated is actually used
This is a specialized geological term, chiefly used in formal descriptions of rocks, rock textures, and fault zones. It normally implies fragmentation followed by consolidation, rather than merely the presence of cracks.
Easily confused with brecciated
Breccia is the rock formed from cemented angular fragments, whereas brecciated is the adjective describing that rock or its texture.
Breccia contains angular rock fragments, while conglomerate contains fragments that have been rounded by abrasion or transport.