- 2075 Asoj · 2 marks
Conglomerate versus agglomerate
Short answer
Conglomerate is a sedimentary rock with rounded gravel clasts cemented in a sand/silt/calcite matrix, bedded. Agglomerate is a pyroclastic igneous rock with angular volcanic fragments in ash, chaotic and unbedded.
Differentiate between conglomerate and agglomerate.
| Point | Conglomerate | Agglomerate |
|---|---|---|
| Rock class | Sedimentary (clastic) | Igneous (pyroclastic) |
| Origin | Rounded gravel transported by water and then cemented | Volcanic bombs and blocks ejected from a volcano and consolidated |
| Fragments | Rounded to sub-rounded pebbles | Angular to sub-angular volcanic fragments |
| Matrix/cement | Sand, silt, clay; silica, calcite or iron oxide | Volcanic ash and tuff |
| Structure | Bedded | Unbedded, chaotic |
✓ Answer checked by Claude Opus 5.5 (high effort)
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