Brecknock Botanical Recording Distribution Map

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Most of the county bedrock is sedimentary, typically Old Red Sandstone.
Other rock types of botanical significance are shown using this colour scheme
Limestone, Dinantian  
Igneous Tuff, Ordovician  
Igneous instrusion, Neoproterozoic  
Igneous instrusion, Ordovician To Silurian  

J R Crellin 2021. Contains British Geological Survey materials UKRI 2021.