Hydrogeology of Wales: Permo-Triassic and Jurassic aquifers - Revision history

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Dbk at 11:52, 30 January 2015

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	==Geological setting==		==Geological setting==

	[[Image:P802430.jpg\|thumb\|~~200px~~\|Jurassic Lias limestone cliffs at Nash Point, South Glamorgan. P802430.]]		[[Image:P802430.jpg\|thumb\|300px\|Jurassic Lias limestone cliffs at Nash Point, South Glamorgan. P802430.]]

	In North Wales Permo-Triassic age strata are limited to part of the Vale of Clwyd on the edge of the East Irish Sea Basin and the western margin of the Cheshire Basin. Much of the Triassic sequence comprises red beds, deposited in an arid desert-like environment, which are uniform, cross-bedded, generally well cemented, fine to medium grained with occasional mudstone horizons but no pebble beds. Halite, gypsum and anhydrite lenses are common and there are occasional wadi-type channel deposits.		In North Wales Permo-Triassic age strata are limited to part of the Vale of Clwyd on the edge of the East Irish Sea Basin and the western margin of the Cheshire Basin. Much of the Triassic sequence comprises red beds, deposited in an arid desert-like environment, which are uniform, cross-bedded, generally well cemented, fine to medium grained with occasional mudstone horizons but no pebble beds. Halite, gypsum and anhydrite lenses are common and there are occasional wadi-type channel deposits.

Dbk at 16:01, 29 January 2015

2015-01-29T16:01:31Z

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	The Jurassic Lower Lias is present in a limited area between Cardiff and Porthcawl. Here the Blue Lias Formation comprises up to 90 m of thinly bedded argillaceous marls and calcareous mudstones, increasing in subcrop towards Bridgend to a thickness of 150 m where marginal oolitic limestones are present ('''Plate P802430''').		The Jurassic Lower Lias is present in a limited area between Cardiff and Porthcawl. Here the Blue Lias Formation comprises up to 90 m of thinly bedded argillaceous marls and calcareous mudstones, increasing in subcrop towards Bridgend to a thickness of 150 m where marginal oolitic limestones are present ('''Plate P802430''').

			==Hydrogeology of Wales - contents==
			{{HOWpages}}


	[[Category:Hydrogeology of Wales\| 022]]		[[Category:Hydrogeology of Wales\| 022]]

Dbk at 08:02, 20 May 2014

2014-05-20T08:02:13Z

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	==Geological setting==		==Geological setting==

	[[Image:P802430.jpg\|thumb\|200px\|Jurassic Lias limestone cliffs at Nash Point, South Glamorgan. ~~[http://bgsintranet/asset-bank/action/viewFullSizedImage?id=390748&size=1000~~ P802430.]]]		[[Image:P802430.jpg\|thumb\|200px\|Jurassic Lias limestone cliffs at Nash Point, South Glamorgan. P802430.]]

	In North Wales Permo-Triassic age strata are limited to part of the Vale of Clwyd on the edge of the East Irish Sea Basin and the western margin of the Cheshire Basin. Much of the Triassic sequence comprises red beds, deposited in an arid desert-like environment, which are uniform, cross-bedded, generally well cemented, fine to medium grained with occasional mudstone horizons but no pebble beds. Halite, gypsum and anhydrite lenses are common and there are occasional wadi-type channel deposits.		In North Wales Permo-Triassic age strata are limited to part of the Vale of Clwyd on the edge of the East Irish Sea Basin and the western margin of the Cheshire Basin. Much of the Triassic sequence comprises red beds, deposited in an arid desert-like environment, which are uniform, cross-bedded, generally well cemented, fine to medium grained with occasional mudstone horizons but no pebble beds. Halite, gypsum and anhydrite lenses are common and there are occasional wadi-type channel deposits.

Dbk at 06:52, 20 May 2014

2014-05-20T06:52:17Z

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	==Geological setting==		==Geological setting==

	~~{\| class="wikitable" width="100pt" style="margin-left~~:~~40px; margin-right:0px; margin-bottom:10px; float:right; text-align:left;"~~		[[Image:P802430.jpg\|thumb\|200px\|Jurassic Lias limestone cliffs at Nash Point, South Glamorgan. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=390748&size=1000 P802430.]]]
	\| ~~<img src="http://bgsintranet/asset-bank/action/directLinkImage?assetId=390748&width=200&height=150">~~
	\|-
	\| Jurassic Lias limestone cliffs at Nash Point, South Glamorgan. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=390748&size=1000 P802430.]
	\|}

	In North Wales Permo-Triassic age strata are limited to part of the Vale of Clwyd on the edge of the East Irish Sea Basin and the western margin of the Cheshire Basin. Much of the Triassic sequence comprises red beds, deposited in an arid desert-like environment, which are uniform, cross-bedded, generally well cemented, fine to medium grained with occasional mudstone horizons but no pebble beds. Halite, gypsum and anhydrite lenses are common and there are occasional wadi-type channel deposits.		In North Wales Permo-Triassic age strata are limited to part of the Vale of Clwyd on the edge of the East Irish Sea Basin and the western margin of the Cheshire Basin. Much of the Triassic sequence comprises red beds, deposited in an arid desert-like environment, which are uniform, cross-bedded, generally well cemented, fine to medium grained with occasional mudstone horizons but no pebble beds. Halite, gypsum and anhydrite lenses are common and there are occasional wadi-type channel deposits.

Dbk: /* Geological setting */

2013-09-23T09:35:41Z

Geological setting

← Older revision		Revision as of 10:35, 23 September 2013
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	In North Wales Permo-Triassic age strata are limited to part of the Vale of Clwyd on the edge of the East Irish Sea Basin and the western margin of the Cheshire Basin. Much of the Triassic sequence comprises red beds, deposited in an arid desert-like environment, which are uniform, cross-bedded, generally well cemented, fine to medium grained with occasional mudstone horizons but no pebble beds. Halite, gypsum and anhydrite lenses are common and there are occasional wadi-type channel deposits.		In North Wales Permo-Triassic age strata are limited to part of the Vale of Clwyd on the edge of the East Irish Sea Basin and the western margin of the Cheshire Basin. Much of the Triassic sequence comprises red beds, deposited in an arid desert-like environment, which are uniform, cross-bedded, generally well cemented, fine to medium grained with occasional mudstone horizons but no pebble beds. Halite, gypsum and anhydrite lenses are common and there are occasional wadi-type channel deposits.


	The Jurassic Lower Lias is present in a limited area between Cardiff and Porthcawl. Here the Blue Lias Formation comprises up to 90 m of thinly bedded argillaceous marls and calcareous mudstones, increasing in subcrop towards Bridgend to a thickness of 150 m where marginal oolitic limestones are present ('''Plate P802430''').		The Jurassic Lower Lias is present in a limited area between Cardiff and Porthcawl. Here the Blue Lias Formation comprises up to 90 m of thinly bedded argillaceous marls and calcareous mudstones, increasing in subcrop towards Bridgend to a thickness of 150 m where marginal oolitic limestones are present ('''Plate P802430''').