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Proto-Thames
The Ancestral Thames is the geologically ancient precursor to the present day River Thames. The river has its origins in the emergence of Britain from a Cretaceous sea over 60 million years ago. Parts of the river's course were profoundly modified by the Anglian (or Elsterian) glaciation some 450,000 years ago. The extensive terrace deposits laid down by the Ancestral Thames over the past two million years or so have provided a rich source of material for studies in geology, geomorphology, palaeontology and archaeology. Cretaceous to Miocene periods During the latter part of the Cretaceous period, around 80 million years ago, sea level is thought to have been over 150 metres higher than today. Much of the land which was later to form Britain was covered by sea. In this marine environment, thick deposits of Chalk were laid down. From the early Paleocene (from around 65 million years ago), much of what is now Britain emerged above sea level. The maximum uplift occurred in the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Thames
The River Thames ( ), known alternatively in parts as the The Isis, River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the Longest rivers of the United Kingdom, second-longest in the United Kingdom, after the River Severn. The river rises at Thames Head in Gloucestershire and flows into the North Sea near Tilbury, Essex and Gravesend, Kent, via the Thames Estuary. From the west, it flows through Oxford (where it is sometimes called the Isis), Reading, Berkshire, Reading, Henley-on-Thames and Windsor, Berkshire, Windsor. The Thames also drains the whole of Greater London. The lower Reach (geography), reaches of the river are called the Tideway, derived from its long Tidal river, tidal reach up to Teddington Lock. Its tidal section includes most of its London stretch and has a rise and fall of . From Oxford to the estuary, the Thames drops by . Running through some of the drier parts of mainland Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crag Group
The Crag Group is a geological group outcropping in East Anglia, England and adjacent areas of the North Sea. Its age ranges from approximately 4.4 to 0.478 million years BP, spanning the late Pliocene and early to middle Pleistocene epochs. It comprises a range of marine and estuarine sands, gravels, silts and clays deposited in a relatively shallow-water, tidally-dominated marine embayment on the western margins of the North Sea basin. The sands are characteristically dark green from glauconite but weather bright orange, with haematite 'iron pans' forming. The lithology of the lower part of the Group is almost entirely flint. The highest formation in the Group, the Wroxham Crag, contains over 10% of far-travelled lithologies, notably quartzite and vein quartz from the Midlands, igneous rocks from Wales, and chert from the Upper Greensand of southeastern England. This exotic rock component was introduced by rivers such as the Bytham River and Proto-Thames. The constituent fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suffolk
Suffolk ( ) is a ceremonial county in the East of England and East Anglia. It is bordered by Norfolk to the north, the North Sea to the east, Essex to the south, and Cambridgeshire to the west. Ipswich is the largest settlement and the county town. The county has an area of and a population of 758,556. After Ipswich (144,957) in the south, the largest towns are Lowestoft (73,800) in the north-east and Bury St Edmunds (40,664) in the west. Suffolk contains five Non-metropolitan district, local government districts, which are part of a two-tier non-metropolitan county administered by Suffolk County Council. The Suffolk coastline, which includes parts of the Suffolk & Essex Coast & Heaths National Landscape, is a complex habitat, formed by London Clay and Crag Group, crag underlain by chalk and therefore susceptible to erosion. It contains several deep Estuary, estuaries, including those of the rivers River Blyth, Suffolk, Blyth, River Deben, Deben, River Orwell, Orwell, River S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek () 'most' and (; Latinized as ) 'new'. The aridification and cooling trends of the preceding Neogene were continued in the Pleistocene. The climate was strongly variable depending on the glacial cycle, oscillating between cold Glacial period, glacial periods and warmer Interglacial, int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Anglia
East Anglia is an area of the East of England, often defined as including the counties of Norfolk, Suffolk and Cambridgeshire, with parts of Essex sometimes also included. The name derives from the Anglo-Saxon kingdom of the East Angles, a people whose name originated in Anglia (Angeln), in what is now Northern Germany. East Anglia is a predominantly rural region and contains mainly flat or low-lying and agricultural land. The area is known for considerable natural beauty. It shares a long North Sea coastline and contains one of the ten national parks in England, The Broads. Norwich is the largest city in the region. Area Definitions of what constitutes East Anglia vary. The Anglo-Saxon Kingdom of East Anglia, established in the 6th century, originally consisted of the modern counties of Norfolk and Suffolk and expanded west into at least part of Cambridgeshire, typically the northernmost parts known as The Fens. The modern NUTS 2 statistical unit of East Anglia compri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch (geology), epoch in the geologic time scale that extends from 5.33 to 2.58See the 2014 version of the ICS geologic time scale million years ago (Ma). It is the second and most recent epoch of the Neogene Period in the Cenozoic, Cenozoic Era. The Pliocene follows the Miocene Epoch and is followed by the Pleistocene Epoch. Prior to the 2009 revision of the geologic time scale, which placed the four most recent major glaciations entirely within the Pleistocene, the Pliocene also included the Gelasian Stage, which lasted from 2.59 to 1.81 Ma, and is now included in the Pleistocene. As with other older geologic periods, the Stratum, geological strata that define the start and end are well-identified but the exact dates of the start a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Medway
The River Medway is a river in South East England. It rises in the High Weald AONB, High Weald, West Sussex and flows through Tonbridge, Maidstone and the Medway conurbation in Kent, before emptying into the Thames Estuary near Sheerness, a total distance of . About of the river lies in East Sussex, with the remainder being in Kent. The Medway has a Drainage basin, catchment area of , the second largest in southern England after the River Thames, Thames. The map opposite shows only the major tributaries: a more detailed map shows the extensive network of smaller streams feeding into the main river. Those tributaries rise from points along the North Downs, the Weald and Ashdown Forest. Tributaries The major tributaries are: * River Eden, Kent, River Eden * River Bourne, Kent, River Bourne, known in the past as the Shode or Busty * River Teise, major sub-tributary River Bewl * River Beult * Loose Stream * River Len Minor tributaries include: * Wateringbury Stream * East Mal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Darent
The Darent is a Kentish tributary of the River Thames and takes the waters of the River Cray as a tributary in the tidal portion of the Darent near Crayford. 'Darenth' is frequently found as the spelling of the river's name in older books and maps, Bartholomew's ''Canals and River of England'' being one example. Bartholomew's ''Gazetteer'' (1954) demonstrates that ''Darent'' means "clear water", a result of it springing from and running through chalk. The purity of the water was a major factor in the development of paper and pharmaceuticals in the area. Darenth Parish (through which the river flows) derives from a Celtic languages, Celtic phrase 'stream where oak-trees grow' (Irish: "dair" = 'oak-tree', "abha" = river)(compare e.g."River Derwent, Cumbria, Derwent"). The landscapes of the valley were painted in a visionary manner by the Victorian artist Samuel Palmer during the mid-1800s. Fed by springs from the greensand hills south of Westerham in Kent and below Limpsfield Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Wey
The River Wey is a main tributary of the River Thames in south east England. Its two branches, one of which rises near Alton, Hampshire, Alton in Hampshire and the other in West Sussex to the south of Haslemere, join at Tilford in Surrey. Once combined, the flow is eastwards then northwards via Godalming and Guildford to meet the Thames at Weybridge. Downstream the river forms the backdrop to Newark Priory and Brooklands. The Wey and Godalming Navigations were built in the 17th and 18th centuries, to create a navigable route from Godalming to the Thames. The Wey drains much of south west Surrey (as well as parts of east Hampshire and the north of West Sussex) and has a total Drainage basin, catchment area of . Although it is the longest tributary of the Thames (if the River Medway, Medway is excluded), its Tributaries of the River Thames, total average discharge is lower than that of the River Kennet, Kennet and River Cherwell, Cherwell. The river morphology and biodiversity o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Mole
The River Mole is a tributary of the River Thames in southern England. It rises in West Sussex near Gatwick Airport and flows north-west through Surrey for to the Thames at Hampton Court Palace. The river gives its name to the Surrey district of Mole Valley. The Mole crosses the North Downs between Dorking and Leatherhead, where it cuts a steep-sided valley, known as the Mole Gap, through the chalk. Much of the catchment area lies on impermeable rock (including Weald Clay and London Clay), meaning that the river level responds rapidly to heavy rainfall. During the second half of the 20th century, pollution levels in the river were high; however, since 1995 the water quality has improved dramatically and the Mole now boasts the greatest diversity of fish species of any river in England. Twelve Sites of Special Scientific Interest (SSSIs) that include wetland habitats are located within the Mole catchment area, and the stretch of river through Leatherhead has been designate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
