CSABA ÉKES; Bedload-transported pedogenic mud aggregates in the Lower Old Red Sandstone in southwest Wales. Journal of the Geological Society ; 150 (3): 469–471. doi: https://doi.org/10.1144/gsjgs.150.3.0469
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Siltstones which exhibit large scale cross stratification and three dimensional bedforms in the Ridgeway Conglomerate Formation are interpreted as partly representing bedload transported pedogenic mud aggregates. The siltstones contain mixed-layer swelling clays, abundant desiccation cracks, calcrete nodules and pseudoanticlinal slip planes which suggest the presence of vertic palaeosols and a hot, seasonal climate. Compaction obliterated much of the original mud aggregate texture which is retained only where quartz grains surround individual aggregates.