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A4119 roadcutting, Llantrisant, Rhondda-Cynon-Taff (Mid Glamorgan; Glamorgan), Wales, UK

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Alstonite : BaCa(CO3)2

A4119 roadcutting, Llantrisant, Rhondda-Cynon-Taff (Mid Glamorgan; Glamorgan), Wales, UK

Alstonite crystals, 1mm, partly replaced by barite. Ian Jones collection. Collected 1990.
 © Ian JonesPhoto ID: 5921    View Count: 713

Baryte : BaSO4

A4119 roadcutting, Llantrisant, Rhondda-Cynon-Taff (Mid Glamorgan; Glamorgan), Wales, UK

Aggregates of doubly terminated thin tabular barite crystals to 10mm lining a cavity in the Triassic Conglomerate, on rhombic calcite crystals. Ian Jones collection, collected 1978.
 © Ian JonesPhoto ID: 5684    View Count: 435

Calcite : CaCO3

A4119 roadcutting, Llantrisant, Rhondda-Cynon-Taff (Mid Glamorgan; Glamorgan), Wales, UK

Grey rhombohedral calcite crystals to 10mm, with a later phase of white calcite selectively overgrowing certain faces. Ian Jones collection, collected 1990 during road widening.
 © Ian JonesPhoto ID: 4845    View Count: 436

Witherite : BaCO3

A4119 roadcutting, Llantrisant, Rhondda-Cynon-Taff (Mid Glamorgan; Glamorgan), Wales, UK

Witherite crystals to 50mm, their surface altered to barite. Ian Jones collection, collected during road widening 1990
 © Ian JonesPhoto ID: 5288    View Count: 498

Witherite : BaCO3, Calcite : CaCO3

A4119 roadcutting, Llantrisant, Rhondda-Cynon-Taff (Mid Glamorgan; Glamorgan), Wales, UK

Aggregated, tabular, 30mm witherite crystals with the surface altered to barite, on a brownish calcite crystal. Ian Jones collection, collected 1990
 © Ian JonesPhoto ID: 6503    View Count: 470

Witherite : BaCO3

A4119 roadcutting, Llantrisant, Rhondda-Cynon-Taff (Mid Glamorgan; Glamorgan), Wales, UK

Group of platey witherite crystals to 45mm, with the surface altered to barite. Ian Jones collection, collected during road widening in 1990.
 © Ian JonesPhoto ID: 4839    View Count: 439
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