These are some of the rocks, which we use in our Alpine troughs in Coolwater Garden. Acidic rocks for plants requiring a low ph environment and alkaline ones for those plants needing a high ph. Pic above is of a silica rock formed after material had been explosively ejected from a volcano vent. Below is a piece of yellow sandstone from Co. Clare.
Below is a piece of Burren limestone obtained not from the Burren but from the same stratum, which showed above the ground elsewhere.
Mudstone located from Co.Cork.
Shale from the Ballyhoura Mountains, which was interspersed with red sandstone conglomerate.
Namurian mudstone from Co. Kerry.
Slate from the Graves of the Leinstermen in Co. Tipperary.
Metamorphic rock from the Barna Gap.
Here is Ballyhoura Mountains shale being used in a revamped trough in the garden. The rain will wash the stones clearer in time.