Breccia

Breccia is distinguished from conglomerate by its angular clasts.

Properties
Rock group Sedimentary
Origin Lithiclastic
Particle size (Wentworth) >2 mm

Breccia in Hand Sample

Volcaniclastic breccia from Mt. St. Helens

Volcaniclastic breccia from the Gallatin Range, Montana

Fault breccia from the Hebgen Lake fault

Landslide breccia from the Crazy Cat landslide in El Paso, Texas

Brecciated quartzite from the Cambrian-aged Antietam Formation

Plate breccia

Breccia in Thin Section

Volcanic breccia, plane polars

Volcanic breccia, crossed polars

Marble breccia, plane polars

Marble breccia, crossed polars