| Rock class: | Clastic Sedimentary Rock |
| Composition: | Angular rock fragments of any type combined in a fine matrix. |
| Color: | Varies considerably |
| Environment: | Fragments were consolidated in situ, often as a result of landslides, detritus, or cave-ins, without having been transported by water. |
| Uses: | Paving. |
| Comments: | Related Terms
Clasts = the included pebbles.
Matrix = the cement that holds the clasts together.
Monogenetic breccia = when the clast fragments are of a single type.
Polygenetic breccia = when multiple types of rock fragments are present.
If the clasts are mostly rounded instead of angular, then the rock is conglomerate instead of breccia (see conglomerate page).
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