Dictionary of Geotourism

2020 Edition
| Editors: Anze Chen, Young Ng, Erkuang Zhang, Mingzhong Tian


Reference work entry
DOI: https://doi.org/10.1007/978-981-13-2538-0_389

Conglomerate is a clastic rock containing round or sub-rounded gravels with diameters greater than 2 mm, which make up more than 30% of the rock mass. Conglomerates form due to localised environmental changes during deposition. Conglomerates with different causes of formation have clear differences in the particle shape, size distribution, composition, maturity, roundness characteristics and spatial arrangement. The clastic components in conglomerate are mainly detritus, whereas the materials that fill the gaps are sand, silt, clay and some chemical sediments. Based on the size of the gravels, conglomerates can be divided into boulders, cobbles, pebbles and fine gravel conglomerates.

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