|
Code |
Sterling (£) |
USD ($) |
Euro (€) |
| |
| Old Red Sandstone (Gloucestershire) |
RS0465 |
£1.95 |
$3.02 |
€2.36 |
 Good
|
|
| Portishead Beds, Upper Red Sandstone (Portishead) |
RS0614 |
£1.95 |
$3.02 |
€2.36 |
Good
|
|
| Upper Caithness Flagstone - Mey Subgroup (Thurso) |
RS0626 |
£1.95 |
$3.02 |
€2.36 |
Good
|
|
| Upper Old Red Sandstone (Tarbat Ness, Scotland) |
RS0625 |
£1.95 |
$3.02 |
€2.36 |
Good
|
|
| Old Red Sandstone, Brecon Beacons |
RS0365 |
£1.95 |
$3.02 |
€2.36 |
Good
|
|
|
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Sedimentary Rocks are formed as sediment from the bottom of rivers, lakes and oceans settles. Layer after layer is deposited on top of each. These layers are pressed down more and more through time, until the bottom layers slowly turn into rock.
