|
| ||
| lithic tuff
Tuff |
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| Meta-igneous, low grade, | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| St David's
Pembrokeshire South Wales |
||
| 20 H 1 |
|
| ||
| bedded rhyolitic tuff
Tuff |
||
| Meta-igneous, low grade, | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| St David's
Pembrokeshire South Wales |
||
| 20 H 2 |
|
| ||
| Holyhead quartzite
Sandstone |
||
| Meta-sediment, arenaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| Anglesey
Anglesey North Wales |
||
| 20 H 3 |
|
| ||
| mudflake conglomerate
Conglomerate |
||
| Sedimentary, rudaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| Sharpstones, Bayston Hill
Shropshire Welsh Borders |
||
| 20 H 4 |
|
| ||
| Swithland Slate
Slate |
||
| Meta-sediment, low grade, | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| Swithland
Leicestershire Central England |
||
| 20 H 5 |
|
| ||
| Torridonian sandstone
Sandstone |
||
| Sedimentary, arenaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| Torridon
Highland North Scotland |
||
| 20 H 6 |
|
| ||
| Torridonian sandstone
Sandstone |
||
| Sedimentary, arenaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| Torridon
Highland North Scotland |
||
| 20 G 6 |
|
| ||
| Torridonian grit
Sandstone |
||
| Sedimentary, arenaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| Loch Assynt
Highland North Scotland |
||
| 20 G 5 |
|
| ||
| Torridonian conglomerate
Conglomerate |
||
| Sedimentary, rudaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
|
Highland North Scotland |
||
| 20 G 4 |
|
| ||
| Torridonian conglomerate
Conglomerate |
||
| Sedimentary, rudaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
|
Highland North Scotland |
||
| 20 G 3 |
|
| ||
| Torridonian conglomerate
Conglomerate |
||
| Sedimentary, rudaceous, clastic | ||
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||
| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
|
Highland North Scotland |
||
| 20 G 2 |
|
| ||
| Torridonian conglomerate
Conglomerate |
||
| Sedimentary, rudaceous, clastic | ||
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||
| Scale bar = 1 centimetre | ||
| Precambrian
545 - 4,560 Ma |
| Stoer Peninsula
Highland North Scotland |
||
| 20 G 1 |
|
| ||
| Pipe Rock quartzite
Sandstone |
||
| Meta-sediment, arenaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
|
Highland North Scotland |
||
| 20 F 1 |
|
| ||
| Wrekin quartzite
Conglomerate |
||
| Meta-sediment, rudaceous, clastic | ||
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| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
| Wrekin
Shropshire Welsh borders |
||
| 20 F 2 |
|
| ||
| Longmynd siltstone
Siltstone |
||
| Meta-sediment, low grade, | ||
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| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
| Longmynd
Shropshire Welsh Borders |
||
| 20 F 3 |
|
| ||
| Manx Slate
Slate |
||
| Meta-sediment, low grade, | ||
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||
| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
| Gob-y-Volley
Isle of Man Northern England |
||
| 20 F 4 |
|
| ||
| Lingula flags
Slate |
||
| Meta-sediment, low grade, | ||
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||
| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
| Dolgellau
Gwynedd North Wales |
||
| 20 F 5 |
|
| ||
| fossiliferous shale
Slate |
||
| Meta-sediment, low grade, | ||
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| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
| St David's
Dyfed South Wales |
||
| 20 F 6 |
|
| ||
| Penrhyn Slate
Slate |
||
| Meta-sediment, low grade, | ||
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||
| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
| Bethesda
Gwynedd North Wales |
||
| 20 E 6 |
|
| ||
| Port Mary Slate
Slate |
||
| Meta-sediment, low grade, | ||
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||
| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
| Port Mary
Strathclyde Central Scotland |
||
| 20 E 5 |
|
| ||
|
|
||
| , , | ||
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||
| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
|
|
||
| 20 |
|
| ||
|
|
||
| , , | ||
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||
| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
|
|
||
| 20 |
|
| ||
|
|
||
| , , | ||
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| Scale bar = 1 centimetre | ||
| Cambrian
495 - 545 Ma |
|
|
||
| 20 |
|
| ||
| Stiperstones Quartzite
Conglomerate |
||
| Meta-sediment, rudaceous, clastic | ||
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||
| Scale bar = 1 centimetre | ||
| Ordovician
443 - 495 Ma |
| Stiperstones
Shropshire Welsh Borders |
||
| 20 D 1 |
|
| ||
| Stiperstones Quartzite
Sandstone |
||
| Meta-sediment, arenaceous, clastic | ||
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||
| Scale bar = 1 centimetre | ||
| Ordovician
443 - 495 Ma |
| Stiperstones
Shropshire Welsh Borders |
||
| 20 D 2 |
|
| ||
| Benan conglomerate
Conglomerate |
||
| Sedimentary, rudaceous, clastic | ||
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||
| Scale bar = 1 centimetre | ||
| Ordovician
443 - 495 Ma |
| Girvan
Strathclyde Central Scotland |
||
| 20 D 3 |
|
| ||
| Lingula shale
Shale |
||
| Sedimentary, argillaceous, clastic | ||
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||
| Scale bar = 1 centimetre | ||
| Ordovician
443 - 495 Ma |
| Bangor
Gwynedd North Wales |
||
| 20 D 4 |
|
| ||
| Tremadoc slate
Slate |
||
| Meta-sediment, low grade, | ||
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||
| Scale bar = 1 centimetre | ||
| Ordovician
443 - 495 Ma |
| Portmadock
Gwynedd North Wales |
||
| 20 D 5 |
|
| ||
| Skiddaw Slate
Slate |
||
| Meta-sediment, low grade, | ||
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||
| Scale bar = 1 centimetre | ||
| Ordovician
443 - 495 Ma |
| Skiddaw
Cumbria Northern England |
||
| 20 D 6 |
|
| ||
| Llanvirn slate
Slate |
||
| Meta-sediment, low grade, | ||
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||
| Scale bar = 1 centimetre | ||
| Ordovician
443 - 495 Ma |
|
North Wales |
||
| 20 C 6 |