Bedrock Geology UK South: The surface layer - Revision history

Jeth1 at 10:30, 12 October 2015

2015-10-12T10:30:44Z

← Older revision		Revision as of 11:30, 12 October 2015
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	__NOTOC__		__NOTOC__
	{{BedS}}		{{BedS}}
	[[Image:P667864.jpg\|thumb\|200px\|Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably ~~drapped~~ from a melting glacier. P667864.]]		[[Image:P667864.jpg\|thumb\|200px\|Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably dropped from a melting glacier. P667864.]]

	'''The great variety of rocks that underlie Britain and Ireland''' can only rarely be clearly seen at the surface. Sea cliffs and mountain crags provide the exception rather than the rule, and for the most part the geological features are concealed beneath a cover of loose detritus, soil and vegetation. Some of this has been formed in situ, from the weathering of the underlying rocks, but across much of the UK the superficial cover was introduced, quite recently in geological terms, by ice sheets and meltwater during an ‘ice age’ that started about 2.6 million years ago until the last glaciers disappeared from the Scottish Highlands, only about 10 500 years ago.		'''The great variety of rocks that underlie Britain and Ireland''' can only rarely be clearly seen at the surface. Sea cliffs and mountain crags provide the exception rather than the rule, and for the most part the geological features are concealed beneath a cover of loose detritus, soil and vegetation. Some of this has been formed in situ, from the weathering of the underlying rocks, but across much of the UK the superficial cover was introduced, quite recently in geological terms, by ice sheets and meltwater during an ‘ice age’ that started about 2.6 million years ago until the last glaciers disappeared from the Scottish Highlands, only about 10 500 years ago.

Dbk at 16:10, 28 July 2015

2015-07-28T16:10:30Z

← Older revision		Revision as of 17:10, 28 July 2015
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	[[Image:P212915.jpg\|thumb\|left\|200px\|Kettlehole in glacial moraine, Canon Bridge, Herefordshire. [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=21461&index=0&total=1&view=viewSearchItem P212915.]]]		[[Image:P212915.jpg\|thumb\|left\|200px\|Kettlehole in glacial moraine, Canon Bridge, Herefordshire. [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=21461&index=0&total=1&view=viewSearchItem P212915.]]]

	'''During this period, bitterly cold intervals''' alternated with relatively warmer conditions, and the glaciers and ice sheets advanced and retreated accordingly. As they did so, they carried in and left behind till and glaciofluvial ~~deposits—huge~~ erratic boulders ('''Plate P667864'''), rubble, sand, and pulverised rock. Some of these deposits were sculpted by the passage of the ice into streamlined mounds and drumlin fields, the larger fields are clearly visible on satellite images, for example in northern Lancashire. Once the ice began to melt copious meltwater washed out vast spreads of sand and gravel while around the margins of the residual glaciers piles of debris built up creating distinctive landforms including moraine, eskers and kettleholes ('''Plate P212915''').		'''During this period, bitterly cold intervals''' alternated with relatively warmer conditions, and the glaciers and ice sheets advanced and retreated accordingly. As they did so, they carried in and left behind till and glaciofluvial deposits — huge erratic boulders ('''Plate P667864'''), rubble, sand, and pulverised rock. Some of these deposits were sculpted by the passage of the ice into streamlined mounds and drumlin fields, the larger fields are clearly visible on satellite images, for example in northern Lancashire. Once the ice began to melt copious meltwater washed out vast spreads of sand and gravel while around the margins of the residual glaciers piles of debris built up creating distinctive landforms including moraine, eskers and kettleholes ('''Plate P212915''').

	'''Although in rather less dramatic fashion''', the cycle of erosion and deposition continues today. Eroded detritus from our hills and mountains is carried down by rivers and either redeposited in flood plains and estuaries, or carried farther out to sea into the subsiding marine basins that surround our coasts. So are formed the rocks of tomorrow.		'''Although in rather less dramatic fashion''', the cycle of erosion and deposition continues today. Eroded detritus from our hills and mountains is carried down by rivers and either redeposited in flood plains and estuaries, or carried farther out to sea into the subsiding marine basins that surround our coasts. So are formed the rocks of tomorrow.

	<br clear=all>		<br clear=all>
	==Bedrock Geology UK South - contents==		==Bedrock Geology UK South — contents==
	{{bedrockSouth}}		{{bedrockSouth}}

	[[Category:Bedrock Geology UK South\| 2]]		[[Category:Bedrock Geology UK South\| 2]]

Dbk at 14:44, 29 January 2015

2015-01-29T14:44:48Z

← Older revision		Revision as of 15:44, 29 January 2015
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	'''Although in rather less dramatic fashion''', the cycle of erosion and deposition continues today. Eroded detritus from our hills and mountains is carried down by rivers and either redeposited in flood plains and estuaries, or carried farther out to sea into the subsiding marine basins that surround our coasts. So are formed the rocks of tomorrow.		'''Although in rather less dramatic fashion''', the cycle of erosion and deposition continues today. Eroded detritus from our hills and mountains is carried down by rivers and either redeposited in flood plains and estuaries, or carried farther out to sea into the subsiding marine basins that surround our coasts. So are formed the rocks of tomorrow.

			<br clear=all>
	==Bedrock Geology UK South - contents==		==Bedrock Geology UK South - contents==
	{{bedrockSouth}}		{{bedrockSouth}}

	[[Category:Bedrock Geology UK South\| 2]]		[[Category:Bedrock Geology UK South\| 2]]

Dbk at 14:30, 29 January 2015

2015-01-29T14:30:15Z

← Older revision		Revision as of 15:30, 29 January 2015
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	'''Although in rather less dramatic fashion''', the cycle of erosion and deposition continues today. Eroded detritus from our hills and mountains is carried down by rivers and either redeposited in flood plains and estuaries, or carried farther out to sea into the subsiding marine basins that surround our coasts. So are formed the rocks of tomorrow.		'''Although in rather less dramatic fashion''', the cycle of erosion and deposition continues today. Eroded detritus from our hills and mountains is carried down by rivers and either redeposited in flood plains and estuaries, or carried farther out to sea into the subsiding marine basins that surround our coasts. So are formed the rocks of tomorrow.

			==Bedrock Geology UK South - contents==
			{{bedrockSouth}}

	[[Category:Bedrock Geology UK South\| 2]]		[[Category:Bedrock Geology UK South\| 2]]

Dbk at 12:38, 19 June 2014

2014-06-19T12:38:04Z

← Older revision		Revision as of 13:38, 19 June 2014
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			__NOTOC__
	{{BedS}}		{{BedS}}
	[[Image:P667864.jpg\|thumb\|200px\|Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably drapped from a melting glacier. P667864.]]		[[Image:P667864.jpg\|thumb\|200px\|Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably drapped from a melting glacier. P667864.]]

Jeth1 at 09:58, 17 June 2014

2014-06-17T09:58:26Z

← Older revision		Revision as of 10:58, 17 June 2014
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	'''During this period, bitterly cold intervals''' alternated with relatively warmer conditions, and the glaciers and ice sheets advanced and retreated accordingly. As they did so, they carried in and left behind till and glaciofluvial deposits—huge erratic boulders ('''Plate P667864'''), rubble, sand, and pulverised rock. Some of these deposits were sculpted by the passage of the ice into streamlined mounds and drumlin fields, the larger fields are clearly visible on satellite images, for example in northern Lancashire. Once the ice began to melt copious meltwater washed out vast spreads of sand and gravel while around the margins of the residual glaciers piles of debris built up creating distinctive landforms including moraine, eskers and kettleholes ('''Plate P212915''').		'''During this period, bitterly cold intervals''' alternated with relatively warmer conditions, and the glaciers and ice sheets advanced and retreated accordingly. As they did so, they carried in and left behind till and glaciofluvial deposits—huge erratic boulders ('''Plate P667864'''), rubble, sand, and pulverised rock. Some of these deposits were sculpted by the passage of the ice into streamlined mounds and drumlin fields, the larger fields are clearly visible on satellite images, for example in northern Lancashire. Once the ice began to melt copious meltwater washed out vast spreads of sand and gravel while around the margins of the residual glaciers piles of debris built up creating distinctive landforms including moraine, eskers and kettleholes ('''Plate P212915''').

	'''Although in rather less dramatic fashion''', the cycle of erosion and deposition continues today. Eroded detritus from our hills and mountains is carried down by rivers and either redeposited in flood plains and estuaries ~~('''Plate 66''')~~, or carried farther out to sea into the subsiding marine basins that surround our coasts. So are formed the rocks of tomorrow.		'''Although in rather less dramatic fashion''', the cycle of erosion and deposition continues today. Eroded detritus from our hills and mountains is carried down by rivers and either redeposited in flood plains and estuaries, or carried farther out to sea into the subsiding marine basins that surround our coasts. So are formed the rocks of tomorrow.

	[[Category:Bedrock Geology UK South\| 2]]		[[Category:Bedrock Geology UK South\| 2]]

Dbk: Protected "Bedrock Geology UK South: The surface layer" ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite)) [cascading]

2014-06-11T12:28:01Z

Protected "Bedrock Geology UK South: The surface layer" ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite)) [cascading]

← Older revision		Revision as of 13:28, 11 June 2014
(No difference)

Dbk at 10:15, 20 May 2014

2014-05-20T10:15:21Z

← Older revision		Revision as of 11:15, 20 May 2014
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	{{BedS}}		{{BedS}}
	[[Image:P667864.jpg\|thumb\|200px\|Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably drapped from a melting glacier. ~~[http://bgsintranet/asset-bank/action/viewFullSizedImage?id=61188&size=1000~~ P667864.]]]		[[Image:P667864.jpg\|thumb\|200px\|Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably drapped from a melting glacier. P667864.]]

	'''The great variety of rocks that underlie Britain and Ireland''' can only rarely be clearly seen at the surface. Sea cliffs and mountain crags provide the exception rather than the rule, and for the most part the geological features are concealed beneath a cover of loose detritus, soil and vegetation. Some of this has been formed in situ, from the weathering of the underlying rocks, but across much of the UK the superficial cover was introduced, quite recently in geological terms, by ice sheets and meltwater during an ‘ice age’ that started about 2.6 million years ago until the last glaciers disappeared from the Scottish Highlands, only about 10 500 years ago.		'''The great variety of rocks that underlie Britain and Ireland''' can only rarely be clearly seen at the surface. Sea cliffs and mountain crags provide the exception rather than the rule, and for the most part the geological features are concealed beneath a cover of loose detritus, soil and vegetation. Some of this has been formed in situ, from the weathering of the underlying rocks, but across much of the UK the superficial cover was introduced, quite recently in geological terms, by ice sheets and meltwater during an ‘ice age’ that started about 2.6 million years ago until the last glaciers disappeared from the Scottish Highlands, only about 10 500 years ago.

	[[Image:P212915.jpg\|thumb\|left\|200px\|Kettlehole in glacial moraine, Canon Bridge, Herefordshire. [http://~~bgsintranet~~/asset-bank/action/~~viewFullSizedImage~~?id=21461&~~size~~=~~1000~~ P212915.]]]		[[Image:P212915.jpg\|thumb\|left\|200px\|Kettlehole in glacial moraine, Canon Bridge, Herefordshire. [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=21461&index=0&total=1&view=viewSearchItem P212915.]]]

	'''During this period, bitterly cold intervals''' alternated with relatively warmer conditions, and the glaciers and ice sheets advanced and retreated accordingly. As they did so, they carried in and left behind till and glaciofluvial deposits—huge erratic boulders ('''Plate P667864'''), rubble, sand, and pulverised rock. Some of these deposits were sculpted by the passage of the ice into streamlined mounds and drumlin fields, the larger fields are clearly visible on satellite images, for example in northern Lancashire. Once the ice began to melt copious meltwater washed out vast spreads of sand and gravel while around the margins of the residual glaciers piles of debris built up creating distinctive landforms including moraine, eskers and kettleholes ('''Plate P212915''').		'''During this period, bitterly cold intervals''' alternated with relatively warmer conditions, and the glaciers and ice sheets advanced and retreated accordingly. As they did so, they carried in and left behind till and glaciofluvial deposits—huge erratic boulders ('''Plate P667864'''), rubble, sand, and pulverised rock. Some of these deposits were sculpted by the passage of the ice into streamlined mounds and drumlin fields, the larger fields are clearly visible on satellite images, for example in northern Lancashire. Once the ice began to melt copious meltwater washed out vast spreads of sand and gravel while around the margins of the residual glaciers piles of debris built up creating distinctive landforms including moraine, eskers and kettleholes ('''Plate P212915''').

Dbk at 07:48, 16 May 2014

2014-05-16T07:48:51Z

← Older revision		Revision as of 08:48, 16 May 2014
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	{{BedS}}		{{BedS}}
	~~{\| class="wikitable" width="100pt" style="margin-left~~:~~40px; margin-right:0px; margin-bottom:10px; float:right; text-align:left;"~~		[[Image:P667864.jpg\|thumb\|200px\|Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably drapped from a melting glacier. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=61188&size=1000 P667864.]]]
	\| ~~<img src="http://bgsintranet/asset-bank/action/directLinkImage?assetId=61188&width=200&height=150">~~
	\|-
	\| Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably drapped from a melting glacier. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=61188&size=1000 P667864.]
	\|}

	'''The great variety of rocks that underlie Britain and Ireland''' can only rarely be clearly seen at the surface. Sea cliffs and mountain crags provide the exception rather than the rule, and for the most part the geological features are concealed beneath a cover of loose detritus, soil and vegetation. Some of this has been formed in situ, from the weathering of the underlying rocks, but across much of the UK the superficial cover was introduced, quite recently in geological terms, by ice sheets and meltwater during an ‘ice age’ that started about 2.6 million years ago until the last glaciers disappeared from the Scottish Highlands, only about 10 500 years ago.		'''The great variety of rocks that underlie Britain and Ireland''' can only rarely be clearly seen at the surface. Sea cliffs and mountain crags provide the exception rather than the rule, and for the most part the geological features are concealed beneath a cover of loose detritus, soil and vegetation. Some of this has been formed in situ, from the weathering of the underlying rocks, but across much of the UK the superficial cover was introduced, quite recently in geological terms, by ice sheets and meltwater during an ‘ice age’ that started about 2.6 million years ago until the last glaciers disappeared from the Scottish Highlands, only about 10 500 years ago.

	{\| ~~class="wikitable" width="100pt" style="margin-~~left~~:0px; margin-right:40px; margin-bottom:10px; float:left; text-align:left;"~~		[[Image:P212915.jpg\|thumb\|left\|200px\|Kettlehole in glacial moraine, Canon Bridge, Herefordshire. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=21461&size=1000 P212915.]]]
	\| ~~<img src="http://bgsintranet/asset-bank/action/directLinkImage?assetId=21461&width=200&height=150">~~
	\|-
	\| Kettlehole in glacial moraine, Canon Bridge, Herefordshire. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=21461&size=1000 P212915.]
	\|}

	'''During this period, bitterly cold intervals''' alternated with relatively warmer conditions, and the glaciers and ice sheets advanced and retreated accordingly. As they did so, they carried in and left behind till and glaciofluvial deposits—huge erratic boulders ('''Plate P667864'''), rubble, sand, and pulverised rock. Some of these deposits were sculpted by the passage of the ice into streamlined mounds and drumlin fields, the larger fields are clearly visible on satellite images, for example in northern Lancashire. Once the ice began to melt copious meltwater washed out vast spreads of sand and gravel while around the margins of the residual glaciers piles of debris built up creating distinctive landforms including moraine, eskers and kettleholes ('''Plate P212915''').		'''During this period, bitterly cold intervals''' alternated with relatively warmer conditions, and the glaciers and ice sheets advanced and retreated accordingly. As they did so, they carried in and left behind till and glaciofluvial deposits—huge erratic boulders ('''Plate P667864'''), rubble, sand, and pulverised rock. Some of these deposits were sculpted by the passage of the ice into streamlined mounds and drumlin fields, the larger fields are clearly visible on satellite images, for example in northern Lancashire. Once the ice began to melt copious meltwater washed out vast spreads of sand and gravel while around the margins of the residual glaciers piles of debris built up creating distinctive landforms including moraine, eskers and kettleholes ('''Plate P212915''').

Dbk at 10:40, 19 September 2013

2013-09-19T10:40:32Z

← Older revision		Revision as of 11:40, 19 September 2013
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	{{BedS}}		{{BedS}}
	{\| class="wikitable" width="100pt" style="margin-left:40px; margin-right:0px; margin-bottom:10px; float:right; text-align:left;"		{\| class="wikitable" width="100pt" style="margin-left:40px; margin-right:0px; margin-bottom:10px; float:right; text-align:left;"
	\| <img src="http://bgsintranet/asset-bank/action/directLinkImage?assetId=61188&width=200&height=~~200~~">		\| <img src="http://bgsintranet/asset-bank/action/directLinkImage?assetId=61188&width=200&height=150">
	\|-		\|-
	\| Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably drapped from a melting glacier. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=61188&size=1000 P667864.]		\| Perched erratic overlooking Tremadoc Bay. This sharp-sedged block was probably drapped from a melting glacier. [http://bgsintranet/asset-bank/action/viewFullSizedImage?id=61188&size=1000 P667864.]