sedimentary
Conglomerate
Conglomerate (Sedimentary Rock)
Hardness varies depending on the matrix and clasts (typically 6-7 for quartz pebbles), color is usually grey, brown, or multicolored, luster is dull, texture is clastic with rounded gravel-sized fragments.
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Physical properties
Hardness varies depending on the matrix and clasts (typically 6-7 for quartz pebbles), color is usually grey, brown, or multicolored, luster is dull, texture is clastic with rounded gravel-sized fragments.
Formation & geological history
Formed by the consolidation and lithification of rounded gravel and pebble-sized clasts, typically in high-energy environments like rivers, beaches, or alluvial fans.
Uses & applications
Used in construction, decorative landscaping, and as crushed stone for aggregate.
Geological facts
Conglomerate is often referred to as 'puddingstone' when the matrix and pebbles have contrasting colors.
Field identification & locations
Easily identified by its characteristic 'gravel-in-cement' appearance; found worldwide in sedimentary basins.
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