Hull Geological Society
Common urban rocks -
(a work in progress)
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A geological times scale for Hull building stones. |
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Geological age |
Date at beginning |
Local rocks |
Building stones |
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after the ice ages |
14 Ka |
Mud and peat |
bricks |
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Quaternary |
2 Ma |
“boulder clay” and gravels |
Cobbles and bricks |
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Tertiary |
65 Ma |
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Dolerites from the Cleveland Dyke |
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Late Cretaceous |
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Chalk |
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Albian stage |
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Red Chalk |
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Early Cretaceous |
113 Ma |
Speeton Clay |
cement |
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Late Jurassic |
!44 Ma |
Oxford and Kimmeridge Clays |
Cement; Portland Stone; Purbeck Marble |
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Middle Jurassic |
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Sandstones and Limestones |
Cave Oolite. Ancaster Stone; Carrara Marble |
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Lower Jurassic |
213 Ma |
Clays |
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Triassic |
252 Ma |
Red clays |
New Red Sandstone |
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Permian |
200 Ma |
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Magnesian Limestone |
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Late Carboniferous |
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“York Stone” |
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Early Carboniferous |
359 Ma |
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Carboniferous Limestone; Frosterley Marble |
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Devonian |
419 Ma |
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Shap Granite |
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Silurian |
444 Ma |
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Ordovician |
485 Ma |
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Tilberthwaite Tuff |
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Cambrian |
541 Ma |
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Welsh slate |
Copyright - Mike Horne and Hull Geological Society 2020
Registered Educational Charity No. 229147