sedimentary

Conglomerate

Conglomeratic Sandstone

Hardness: variable (6-7 for clasts); Color: tan, grey, beige with darker pebbles; Luster: dull/earthy matrix with vitereous clasts; Structure: clastic texture with rounded rock fragments embedded in a fine-grained matrix.

Hardness: variable (6-7 for clasts)
Color: tan, grey, beige with darker pebbles
Luster: dull/earthy matrix with vitereous clasts

Identified July 6, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed in high-energy environments like riverbeds or alluvial fans where water current is strong enough to move large pebbles. Over time, these sediments are buried and cemented by minerals like silica or calcite. The location of 55.6°N, 8.1°E in western Denmark is consistent with glacial deposits and sedimentary drift common in the Jutland region.

Uses & applications

Used primarily as coarse aggregate in the construction industry for concrete and road building. Occasionally used as a decorative stone in landscaping.

Geological facts

Conglomerates are often referred to as 'puddingstone' because they look like raisins or nuts in a pudding. They are key indicators for geologists of ancient river systems and shoreline environments.

Field identification & locations

Identify by the presence of rounded, water-worn pebbles (clasts) larger than 2mm bonded together by a natural cement. Common in river valleys, glacial moraines, and coastal exposures across Denmark.