|
List Of Geology Of English Counties
The following is a list of articles about the geology of English counties: *Bedfordshire *Berkshire *Bristol *Buckinghamshire *Cambridgeshire *Cheshire *Cornwall *Cumbria *Derbyshire *Devon *Dorset * Durham *East Riding of Yorkshire *East Sussex *Essex *Gloucestershire *Greater Manchester *Hampshire *Herefordshire *Hertfordshire *Isle of Wight *Kent *Lancashire *Leicestershire *Lincolnshire *London *Merseyside *Norfolk *Northamptonshire *Northumberland *North Yorkshire *Nottinghamshire *Oxfordshire *Rutland *Shropshire *Somerset *South Yorkshire *Staffordshire *Suffolk *Surrey *Tyne and Wear *Warwickshire *West Midlands *West Sussex *West Yorkshire *Wiltshire *Worcestershire *Yorkshire See also * Geology of England Counties England geography-related lists English counties The counties of England are areas used for different purposes, which include administrative, geographical, cultural and political demarcation. The term "county" is defined in several ways and can apply t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Essex
: ''This article describes the geology of the ceremonial county of Essex. It includes the boroughs of Southend-on-Sea and Thurrock.'' The geology of Essex in southeast England largely consists of Cenozoic marine sediments from the Palaeogene and Neogene periods overlain by a suite of superficial deposits of Quaternary age. Cretaceous The oldest rock in Essex is the White Chalk which occurs in the northwest of the county around Saffron Walden, as far east as Sudbury and south to Bishop's Stortford. Palaeogene With the exception of a small inlier of Palaeocene sands at Witham, the lowest units of the Palaeogene sequence evident in Essex are the various Palaeocene/Eocene pebbly and shelly sand and clay formations of the Lambeth Group. Their outcrop reaches from Sudbury on the Norfolk border southwestwards to the Hertfordshire border at Bishop's Stortford. However the bedrock of the larger part of the county is formed by the silty clays and sandy clays of the succeeding Eocene age ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Norfolk
The geology of Norfolk in eastern England largely consists of late Mesozoic and Cenozoic sedimentary rocks of marine origin covered by an extensive spread of unconsolidated recent deposits. Jurassic The oldest rocks at or near the surface in Norfolk are late Jurassic mudstones and muddy limestones which underlie recent deposits in the area west of King's Lynn and Downham Market. Cretaceous Overlying the Jurassic is a Cretaceous sequence whose lowermost unit is the Wealden Group comprising mudstones, limestones, siltstones and sandstones and which extends in a band from Hunstanton southwards to south of the village of Southery. A narrow band of sandstone immediately east of this constitutes the Lower Greensand Group and beyond this, and stratigraphically above it, lie the mudstones and sandstones of the Gault and Upper Greensand formations. The Grey Chalk and the White Chalk subgroups and the Hunstanton Formation overlie the Greensand. The Chalk extends across the rest of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Merseyside
: ''This article describes the geology of the ceremonial county of Merseyside which includes the City of Liverpool and the modern metropolitan boroughs of Knowsley, Sefton and St Helens which prior to 1974 were part of the historic county of Lancashire and the Metropolitan Borough of Wirral which was until then part of the historic county of Cheshire.'' The geology of Merseyside in northwest England largely consists of a faulted sequence of Carboniferous Coal Measures rocks overlain in the west by younger Triassic and Permian age sandstones and mudstones. Glaciation during the present Quaternary Period has left widespread glacial till as well as erosional landforms. Other post-glacial superficial deposits such as river and estuarine alluvium, peat and blown sand are abundant. Carboniferous Carboniferous rocks underlie all of Merseyside but are only exposed to the east of the north-south Boundary Fault. The sequence encountered locally comprises (in descending order, youngest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of London
The geology of London comprises various differing layers of sedimentary rock upon which London, England is built. Oldest rocks The oldest rocks proved through boreholes to exist below London are the old, hard rocks of the Palaeozoic. These consist of Silurian mudstones and sandstones, generally overlain by Devonian strata which are largely of Old Red Sandstone. The Devonian rocks are absent in parts of South London. The Palaeozoic rocks dip southwards and are more than 1,000 metres below the English Channel. Above this is a 60-metre thick layer of impermeable Gault clays. These clays are relatively young, only going back to the early Cretaceous which began around 144 million years ago. On top of these clays is a non-contiguous layer of Upper Greensand above which lies a rolling bed of white chalk about 200 metres thick. In the Lower Chalk and in the lower region of the Middle Chalk there are abundant fossilized shell fragments, especially ''Inoceramus'' clams. In places these form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Lincolnshire
: ''This article describes the geology of the ceremonial county of Lincolnshire. Besides the modern administrative county, it includes the unitary authority areas of North Lincolnshire and North East Lincolnshire.'' The geology of Lincolnshire in eastern England largely consists of an easterly dipping succession of Mesozoic age sedimentary rocks, obscured across large parts of the county by unconsolidated deposits dating from the last few hundred thousand years of the present Quaternary Period. Triassic The oldest rocks exposed at or near the surface of Lincolnshire are the sandstones and mudstones of the early Triassic Sherwood Sandstone Group. Rocks from this and the overlying Mercia Mudstone and Penarth groups occur in the northwest of the county and along its western border but are generally concealed beneath a thick cover of recent deposits. Jurassic A range of rocks from the Jurassic Period occur within a broadly north-south outcrop which tapers markedly northwards from t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Leicestershire
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Lancashire
: ''This article covers the modern ceremonial county of Lancashire which includes the boroughs of Blackpool and Blackburn with Darwen but not those southern parts of the historic county of Lancashire which have since 1974 formed a part of the counties of Merseyside and Greater Manchester nor the northernmost part which now forms a part of Cumbria.'' The geology of Lancashire in northwest England consists in the main of Carboniferous age rocks but with Triassic sandstones and mudstones at or near the surface of the lowlands bordering the Irish Sea though these are largely obscured by Quaternary deposits. Silurian A small fault-bounded area of rocks of Wenlock age lies to the north of Ireby in the extreme north of the county. Carboniferous Rocks originating in the Carboniferous Period underlie the uplands of eastern and north Lancashire. Listed in order of succession i.e. lowermost/oldest first, they comprise the various limestones, mudstones, siltstones and sandstones of the Bow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Kent
: ''This article describes the geology of the ceremonial county of Kent. It includes the borough of Medway.'' The geology of Kent in southeast England largely consists of a succession of northward dipping late Mesozoic and Cenozoic sedimentary rocks overlain by a suite of unconsolidated deposits of more recent origin. Overview Kent is the south-easternmost county in England. It is bounded on the north by the River Thames and the North Sea, and on the south by the Straits of Dover and the English Channel. The continent of Europe is a mere 21 miles across the Strait. The major geographical features of the county are determined by a series of ridges running from west to east across the county. These ridges are the remains of the Wealden dome, a denuded anticline across Kent, Surrey and Sussex, which was the result of uplifting caused by the Alpine movements between 10-20 million years ago. The dome was formed of an upper layer of Chalk above subsequent layers of Upper Greens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of The Isle Of Wight
The geology of the Isle of Wight is dominated by sedimentary rocks of Cretaceous and Paleogene age. This sequence was affected by the late stages of the Alpine Orogeny, forming the Isle of Wight monocline, the cause of the steeply-dipping outcrops of the Chalk Group and overlying Paleogene strata seen at The Needles, Alum Bay and Whitecliff Bay. Pre-Cretaceous Rocks of Devonian, Triassic and Jurassic age are known to be present in the subsurface of the island from boreholes and interpreted seismic reflection profiles. Up to 389 m of presumed Devonian sedimentary rocks been proved by six boreholes drilled on the island, consisting of claystone, siltstone, sandstone and quartzite, similar in type to other dated Devonian sequences. A nearly full Triassic succession has been drilled, reaching a maximum thickness of 450 m. Sandstones of the Sherwood Sandstone Group are overlain by claystones and siltstones of the Mercia Mudstone Group and limestones of the Penarth Group. A complete Jur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Hertfordshire
The geology of Hertfordshire describes the rocks of the English county of Hertfordshire which are a northern part of the great shallow syncline known as the London Basin. The beds dip in a south-easterly direction towards the syncline's lowest point roughly under the River Thames. The most important formations are the Cretaceous chalks, which are exposed as the high ground in the north and west of the county, and the Cenozoic rocks made up of the Paleocene age Reading beds and Eocene age London Clay that occupies the remaining southern part.Hertfordshire Geological Society The Cretaceous On the northern boundary and just inside the county, at the foot of the chalk Chiltern Hills, near Tring and Ashwell, there is a small strip of exposed Cretaceous Gault Clay and Upper Greensand. At 100 million years old, these are the oldest rocks in the county. Rocks get progressively younger as one moves in a south easterly direction through the county. The lowest layer of the chalk is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Herefordshire
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
