Hull Geological Society
Common urban rocks -
(a work in progress)
Slate can be used for gravestones and can retain a fine carved inscription of a long time.
Green slates come from the Lake District, and when used for roofing tend to be thicker.
Slates from China are now being used for flooring. They tend to be shaley and have some orange weathering.
Copyright - Mike Horne and Hull Geological Society 2020
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