| 11. | It rests conformably on the Graminia Formation siltstone of the Winterburn Group.
|
| 12. | It occurs from Casino consisting of soft sandstone, siltstone and claystone.
|
| 13. | The oldest rocks in the quarry comprise late Ordovician siltstones.
|
| 14. | The Ashdown Formation typically comprises sandstones, siltstones and mudstones.
|
| 15. | It consists primarily of laminated oil shale, claystone, and siltstone.
|
| 16. | In the central part of the watershed, the bedrock is siltstone.
|
| 17. | This consists of siltstone and shale and comes from the Devonian period.
|
| 18. | The formation is primarily composed of limestone, siltstone, and dolostone.
|
| 19. | The middle portion and most of the upper portion are on siltstone.
|
| 20. | The potholes are in sandstone and siltstone of the Trimmers Rock Formation.
|
