sedimentary
Conglomerate
Conglomerate (Clastic sedimentary rock)
Hardness: variable depending on clasts (usually 3-7 on Mohs scale), Color: mixed grays, browns, and tans, Luster: dull/earthy, Crystal structure: clastic (fragmented), Cleavage: none, Specific gravity: 2.6-2.9
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Physical properties
Hardness: variable depending on clasts (usually 3-7 on Mohs scale), Color: mixed grays, browns, and tans, Luster: dull/earthy, Crystal structure: clastic (fragmented), Cleavage: none, Specific gravity: 2.6-2.9
Formation & geological history
Formed through the lithification of rounded gravel and boulder-sized clasts in high-energy environments like riverbeds or alluvial fans. Can range from Precambrian to recent geological ages.
Uses & applications
Used primarily in the construction industry as coarse aggregate for concrete and as a decorative stone in landscaping or interior design.
Geological facts
Conglomerate is often called 'puddingstone' in some regions due to its appearance; it represents ancient high-energy water environments where fragments were rounded by transport.
Field identification & locations
Identify in the field by looking for rounded pebbles or rocks of varying sizes cemented together in a finer-grained matrix. Found globally in ancient river systems or coastal regions.
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