The Oxford Clay is a Jurassic marine sedimentary rock formation underlying much of southeast England, from as far west as Dorset and as far north as Yorkshire. The Oxford Clay Formation dates to the Jurassic the Callovian and Oxfordian ages, comprises two main facies; the lower facies comprises a fossiliferous organic-rich mudstone. This facies and its rocks are known as lower Oxford Clay; the upper facies comprises the middle Oxford Clay, the Stewartby Member, the upper Oxford Clay, the Weymouth Member. The upper facies is a fossil poor assemblage of calcareous mudstones. Oxford Clay appears at the surface around Oxford and Weymouth and is exposed in many quarries around these areas; the top of the Lower Oxford Clay shows a lithological change, where fissile shale changes to grey mudstone. The Middle and Upper Oxford Clays differ as they are separated by an argillaceous limestone in the South Midlands; the Callovo-Oxfordian Clay occurs in the Paris Basin and it is a potential host formation to dispose of high-level radioactive waste in France.
The Oxford Clay is well known for its rich fossil record of fish and invertebrates. Many of the fossils are well preserved some are found exceptionally well preserved. Animals which lived in the Oxford Clay Sea include plesiosaurs, marine crocodiles, cephalopods, a variety of gastropods. Dinosaur eggs are stratigraphically present in the Lower Oxford Clay. Geographically, they are located in England. Indeterminate euronithopod remains stratigraphically present in the Lower Oxford Clay and geographically located in Cambridgeshire, England. Oxford Clay has a porous consistency and is soft and is used in the making of roads, it is the source of the Fletton stock brick of which much of London is built. For brick making, the Oxford Clay has the advantage of containing carbon which provides part of the fuel required in firing it so reducing the requirement for an external fuel source. List of fossil sites List of dinosaur-bearing rock formations Kimmeridge Clay London Clay Weald Clay Weishampel, David B..
861 pp. ISBN 0-520-24209-2. Andrews, C. W. 1910. "A Descriptive Catalogue of the Marine Reptiles of the Oxford Clay, Part I". British Museum, England: 205 pp. Andrews, CW. 1913. A descriptive catalogue of the Marine Reptiles of the Oxford Clay, Part II. British Museum. Pp. 205pp. M. J. Benton and P. S. Spencer. 1995. Fossil Reptiles of Great Britain. Chapman & Hall, London 1-386 J. B. Delair. 1973. The dinosaurs of Wiltshire; the Wiltshire Archaeological and Natural History Magazine 68:1-7 P. M. Galton. 1980. European Jurassic ornithopod dinosaurs of the families Camptosauridae. Neues Jahrbuch für Abhandlungen 160:73-95 D. M. Martill. 1988. A review of the terrestrial vertebrate of fossils of the Oxford Clay of England. Mercian Geologist 11:171-190
Cambridge is a university city and the county town of Cambridgeshire, England, on the River Cam 50 miles north of London. At the United Kingdom Census 2011, its population was 123,867 including 24,506 students. Cambridge became an important trading centre during the Roman and Viking ages, there is archaeological evidence of settlement in the area as early as the Bronze Age; the first town charters were granted in the 12th century, although modern city status was not conferred until 1951. The world-renowned University of Cambridge was founded in 1209; the buildings of the university include King's College Chapel, Cavendish Laboratory, the Cambridge University Library, one of the largest legal deposit libraries in the world. The city's skyline is dominated by several college buildings, along with the spire of the Our Lady and the English Martyrs Church, the chimney of Addenbrooke's Hospital and St John's College Chapel tower. Anglia Ruskin University, which evolved from the Cambridge School of Art and the Cambridgeshire College of Arts and Technology has its main campus in the city.
Cambridge is at the heart of the high-technology Silicon Fen with industries such as software and bioscience and many start-up companies born out of the university. More than 40% of the workforce have a higher education qualification, more than twice the national average; the Cambridge Biomedical Campus, one of the largest biomedical research clusters in the world, is soon to house premises of AstraZeneca, a hotel and the relocated Papworth Hospital. The first game of association football took place at Parker's Piece; the Strawberry Fair music and arts festival and Midsummer Fair are held on Midsummer Common, the annual Cambridge Beer Festival takes place on Jesus Green. The city is adjacent to the A14 roads. Cambridge station is less than an hour from London King's Cross railway station. Settlements have existed around the Cambridge area since prehistoric times; the earliest clear evidence of occupation is the remains of a 3,500-year-old farmstead discovered at the site of Fitzwilliam College.
Archaeological evidence of occupation through the Iron Age is a settlement on Castle Hill from the 1st century BC relating to wider cultural changes occurring in southeastern Britain linked to the arrival of the Belgae. The principal Roman site is a small fort Duroliponte on Castle Hill, just northwest of the city centre around the location of the earlier British village; the fort was bounded on two sides by the lines formed by the present Mount Pleasant, continuing across Huntingdon Road into Clare Street. The eastern side followed Magrath Avenue, with the southern side running near to Chesterton Lane and Kettle's Yard before turning northwest at Honey Hill, it was converted to civilian use around 50 years later. Evidence of more widespread Roman settlement has been discovered including numerous farmsteads and a village in the Cambridge district of Newnham. Following the Roman withdrawal from Britain around 410, the location may have been abandoned by the Britons, although the site is identified as Cair Grauth listed among the 28 cities of Britain by the History of the Britons.
Evidence exists that the invading Anglo-Saxons had begun occupying the area by the end of the century. Their settlement – on and around Castle Hill – became known as Grantebrycge. Anglo-Saxon grave goods have been found in the area. During this period, Cambridge benefited from good trade links across the hard-to-travel fenlands. By the 7th century, the town was less significant and described by Bede as a "little ruined city" containing the burial site of Etheldreda. Cambridge was on the border between the East and Middle Anglian kingdoms and the settlement expanded on both sides of the river; the arrival of the Vikings was recorded in the Anglo-Saxon Chronicle in 875. Viking rule, the Danelaw, had been imposed by 878 Their vigorous trading habits caused the town to grow rapidly. During this period the centre of the town shifted from Castle Hill on the left bank of the river to the area now known as the Quayside on the right bank. After the Viking period, the Saxons enjoyed a return to power, building churches such as St Bene't's Church, merchant houses and a mint, which produced coins with the town's name abbreviated to "Grant".
In 1068, two years after his conquest of England, William of Normandy built a castle on Castle Hill. Like the rest of the newly conquered kingdom, Cambridge fell under the control of the King and his deputies; the first town charter was granted by Henry I between 1120 and 1131. It recognised the borough court; the distinctive Round Church dates from this period. In 1209, Cambridge University was founded by students escaping from hostile townspeople in Oxford; the oldest existing college, was founded in 1284. In 1349 Cambridge was affected by the Black Death. Few records survive; the town north of the river was affected being wiped out. Following further depopulation after a second national epidemic in 1361, a letter from the Bishop of Ely suggested that two parishes in Cambridge be merged as there were not enough people to fill one church. With more than a third of English clergy dying in the Black Death, four new colleges were established at the university over the following years to train new clergymen, namely Gonville Hall, Trinity Hall, Corpus Christi and Clare.
In 1382 a revised town charter effects a "diminution of the liberties that the community had enjoyed", due to Cambridge's pa
A geologist is a scientist who studies the solid and gaseous matter that constitutes the Earth and other terrestrial planets, as well as the processes that shape them. Geologists study geology, although backgrounds in physics, chemistry and other sciences are useful. Field work is an important component of geology, although many subdisciplines incorporate laboratory work. Geologists work in the energy and mining sectors searching for natural resources such as petroleum, natural gas and base metals, they are in the forefront of preventing and mitigating damage from natural hazards and disasters such as earthquakes, volcanoes and landslides. Their studies are used to warn the general public of the occurrence of these events. Geologists are important contributors to climate change discussions. James Hutton is viewed as the first modern geologist. In 1785 he presented a paper entitled Theory of the Earth to the Royal Society of Edinburgh. In his paper, he explained his theory that the Earth must be much older than had been supposed to allow enough time for mountains to be eroded and for sediments to form new rocks at the bottom of the sea, which in turn were raised up to become dry land.
Hutton published a two-volume version of his ideas in 1795. Followers of Hutton were known as Plutonists because they believed that some rocks were formed by vulcanism, the deposition of lava from volcanoes, as opposed to the Neptunists, led by Abraham Werner, who believed that all rocks had settled out of a large ocean whose level dropped over time; the first geological map of the United States was produced in 1809 by William Maclure. In 1807, Maclure commenced the self-imposed task of making a geological survey of the United States; every state in the Union was traversed and mapped by him. The results of his unaided labors were submitted to the American Philosophical Society in a memoir entitled Observations on the Geology of the United States explanatory of a Geological Map, published in the Society's Transactions, together with the nation's first geological map; this antedates William Smith's geological map of England by six years, although it was constructed using a different classification of rocks.
Sir Charles Lyell first published his famous book, Principles of Geology, in 1830. This book, which influenced the thought of Charles Darwin promoted the doctrine of uniformitarianism; this theory states that slow geological processes have occurred throughout the Earth's history and are still occurring today. In contrast, catastrophism is the theory that Earth's features formed in single, catastrophic events and remained unchanged thereafter. Though Hutton believed in uniformitarianism, the idea was not accepted at the time. For an aspiring geologist, training includes significant coursework in physics and chemistry, in addition to classes offered through the geology department. Most geologists need skills in GIS and other mapping techniques. Geology students spend portions of the year the summer though sometimes during a January term and working under field conditions with faculty members. Many non-geologists take geology courses or have expertise in geology that they find valuable to their fields.
Geologists may concentrate their studies or research in one or more of the following disciplines: Economic geology: the study of ore genesis, the mechanisms of ore creation, geostatistics. Engineering geology: application of the geologic sciences to engineering practice for the purpose of assuring that the geologic factors affecting the location, construction and maintenance of engineering works are recognized and adequately provided for. Geochemistry: the applied branch deals with the study of the chemical makeup and behaviour of rocks, the study of the behaviour of their minerals. Geochronology: the study of isotope geology toward determining the date within the past of rock formation, metamorphism and geological events. Geomorphology: the study of landforms and the processes that create them Hydrogeology: the study of the origin and movement of groundwater water in a subsurface geological system. Igneous petrology: the study of igneous processes such as igneous differentiation, fractional crystallization and volcanological phenomena.
Isotope geology: the case of the isotopic composition of rocks to determine the processes of rock and planetary formation. Metamorphic petrology: the study of the effects of metamorphism on minerals and rocks. Marine geology: the study of the seafloor. Marine geology has strong ties to physical plate tectonics. Palaeoclimatology: the application of geological science to determine the climatic conditions present in the Earth's atmosphere within the Earth's history. Palaeontology: the classification and taxonomy of fossils within the geological record and the construction of a palaeontological history of the Earth. Pe
England is a country, part of the United Kingdom. It shares land borders with Wales to Scotland to the north-northwest; the Irish Sea lies west of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east and the English Channel to the south; the country covers five-eighths of the island of Great Britain, which lies in the North Atlantic, includes over 100 smaller islands, such as the Isles of Scilly and the Isle of Wight. The area now called England was first inhabited by modern humans during the Upper Palaeolithic period, but takes its name from the Angles, a Germanic tribe deriving its name from the Anglia peninsula, who settled during the 5th and 6th centuries. England became a unified state in the 10th century, since the Age of Discovery, which began during the 15th century, has had a significant cultural and legal impact on the wider world; the English language, the Anglican Church, English law – the basis for the common law legal systems of many other countries around the world – developed in England, the country's parliamentary system of government has been adopted by other nations.
The Industrial Revolution began in 18th-century England, transforming its society into the world's first industrialised nation. England's terrain is chiefly low hills and plains in central and southern England. However, there is upland and mountainous terrain in the west; the capital is London, which has the largest metropolitan area in both the United Kingdom and the European Union. England's population of over 55 million comprises 84% of the population of the United Kingdom concentrated around London, the South East, conurbations in the Midlands, the North West, the North East, Yorkshire, which each developed as major industrial regions during the 19th century; the Kingdom of England – which after 1535 included Wales – ceased being a separate sovereign state on 1 May 1707, when the Acts of Union put into effect the terms agreed in the Treaty of Union the previous year, resulting in a political union with the Kingdom of Scotland to create the Kingdom of Great Britain. In 1801, Great Britain was united with the Kingdom of Ireland to become the United Kingdom of Great Britain and Ireland.
In 1922 the Irish Free State seceded from the United Kingdom, leading to the latter being renamed the United Kingdom of Great Britain and Northern Ireland. The name "England" is derived from the Old English name Englaland, which means "land of the Angles"; the Angles were one of the Germanic tribes that settled in Great Britain during the Early Middle Ages. The Angles came from the Anglia peninsula in the Bay of Kiel area of the Baltic Sea; the earliest recorded use of the term, as "Engla londe", is in the late-ninth-century translation into Old English of Bede's Ecclesiastical History of the English People. The term was used in a different sense to the modern one, meaning "the land inhabited by the English", it included English people in what is now south-east Scotland but was part of the English kingdom of Northumbria; the Anglo-Saxon Chronicle recorded that the Domesday Book of 1086 covered the whole of England, meaning the English kingdom, but a few years the Chronicle stated that King Malcolm III went "out of Scotlande into Lothian in Englaland", thus using it in the more ancient sense.
According to the Oxford English Dictionary, its modern spelling was first used in 1538. The earliest attested reference to the Angles occurs in the 1st-century work by Tacitus, Germania, in which the Latin word Anglii is used; the etymology of the tribal name itself is disputed by scholars. How and why a term derived from the name of a tribe, less significant than others, such as the Saxons, came to be used for the entire country and its people is not known, but it seems this is related to the custom of calling the Germanic people in Britain Angli Saxones or English Saxons to distinguish them from continental Saxons of Old Saxony between the Weser and Eider rivers in Northern Germany. In Scottish Gaelic, another language which developed on the island of Great Britain, the Saxon tribe gave their name to the word for England. An alternative name for England is Albion; the name Albion referred to the entire island of Great Britain. The nominally earliest record of the name appears in the Aristotelian Corpus the 4th-century BC De Mundo: "Beyond the Pillars of Hercules is the ocean that flows round the earth.
In it are two large islands called Britannia. But modern scholarly consensus ascribes De Mundo not to Aristotle but to Pseudo-Aristotle, i.e. it was written in the Graeco-Roman period or afterwards. The word Albion or insula Albionum has two possible origins, it either derives from a cognate of the Latin albus meaning white, a reference to the white cliffs of Dover or from the phrase the "island of the Albiones" in the now lost Massaliote Periplus, attested through Avienus' Ora Maritima to which the former served as a source. Albion is now applied to England in a more poetic capacity. Another romantic name for England is Loegria, related to the Welsh word for England and made popular by its use in Arthurian legend; the earliest known evidence of human presence in the area now known as England was that of Homo antecessor, dating to approximate
Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, grow from a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from 8.5 millionths of a metre to 33.6 metres and have complex interactions with each other and their environments, forming intricate food webs. The category includes humans, but in colloquial use the term animal refers only to non-human animals; the study of non-human animals is known as zoology. Most living animal species are in the Bilateria, a clade whose members have a bilaterally symmetric body plan; the Bilateria include the protostomes—in which many groups of invertebrates are found, such as nematodes and molluscs—and the deuterostomes, containing the echinoderms and chordates.
Life forms interpreted. Many modern animal phyla became established in the fossil record as marine species during the Cambrian explosion which began around 542 million years ago. 6,331 groups of genes common to all living animals have been identified. Aristotle divided animals into those with those without. Carl Linnaeus created the first hierarchical biological classification for animals in 1758 with his Systema Naturae, which Jean-Baptiste Lamarck expanded into 14 phyla by 1809. In 1874, Ernst Haeckel divided the animal kingdom into the multicellular Metazoa and the Protozoa, single-celled organisms no longer considered animals. In modern times, the biological classification of animals relies on advanced techniques, such as molecular phylogenetics, which are effective at demonstrating the evolutionary relationships between animal taxa. Humans make use of many other animal species for food, including meat and eggs. Dogs have been used in hunting, while many aquatic animals are hunted for sport.
Non-human animals have appeared in art from the earliest times and are featured in mythology and religion. The word "animal" comes from the Latin animalis, having soul or living being; the biological definition includes all members of the kingdom Animalia. In colloquial usage, as a consequence of anthropocentrism, the term animal is sometimes used nonscientifically to refer only to non-human animals. Animals have several characteristics. Animals are eukaryotic and multicellular, unlike bacteria, which are prokaryotic, unlike protists, which are eukaryotic but unicellular. Unlike plants and algae, which produce their own nutrients animals are heterotrophic, feeding on organic material and digesting it internally. With few exceptions, animals breathe oxygen and respire aerobically. All animals are motile during at least part of their life cycle, but some animals, such as sponges, corals and barnacles become sessile; the blastula is a stage in embryonic development, unique to most animals, allowing cells to be differentiated into specialised tissues and organs.
All animals are composed of cells, surrounded by a characteristic extracellular matrix composed of collagen and elastic glycoproteins. During development, the animal extracellular matrix forms a flexible framework upon which cells can move about and be reorganised, making the formation of complex structures possible; this may be calcified, forming structures such as shells and spicules. In contrast, the cells of other multicellular organisms are held in place by cell walls, so develop by progressive growth. Animal cells uniquely possess the cell junctions called tight junctions, gap junctions, desmosomes. With few exceptions—in particular, the sponges and placozoans—animal bodies are differentiated into tissues; these include muscles, which enable locomotion, nerve tissues, which transmit signals and coordinate the body. There is an internal digestive chamber with either one opening or two openings. Nearly all animals make use of some form of sexual reproduction, they produce haploid gametes by meiosis.
These fuse to form zygotes, which develop via mitosis into a hollow sphere, called a blastula. In sponges, blastula larvae swim to a new location, attach to the seabed, develop into a new sponge. In most other groups, the blastula undergoes more complicated rearrangement, it first invaginates to form a gastrula with a digestive chamber and two separate germ layers, an external ectoderm and an internal endoderm. In most cases, a third germ layer, the mesoderm develops between them; these germ layers differentiate to form tissues and organs. Repeated instances of mating with a close relative during sexual reproduction leads to inbreeding depression within a population due to the increased prevalence of harmful recessive traits. Animals have evolved numerous mechanisms for avoiding close inbreeding. In some species, such as the splendid fairywren, females benefit by mating with multiple males, thus producing more offspring of higher genetic quality; some animals are capable of asexual reproduction, which results
The Oxfordian is, in the ICS' geologic timescale, the earliest age of the Late Jurassic epoch, or the lowest stage of the Upper Jurassic series. It spans the time between 163.5 ± 4 Ma and 157.3 ± 4 Ma. The Oxfordian is followed by the Kimmeridgian; the Oxfordian stage was called "Clunch Shale" by William Smith. The term Oxfordian was introduced by Alcide d'Orbigny in 1844; the name is derived from the English county of Oxford, where the beds are well developed, but they crop out continuously from Dorset to the coast of Yorkshire forming low, broad valleys. They are well exposed at Weymouth, Bedford, in the cliffs at Scarborough, Red Cliff and Gristhorpe Bay. Rocks of this age are found in Uig and Skye; the base of the Oxfordian stage is defined as the point in the stratigraphic record where the ammonite species Brightia thuouxensis first appears. A global reference profile for the base had in 2009 not yet been assigned; the top of the Oxfordian stage is at the first appearance of ammonite species Pictonia baylei.
In the Tethys domain, the Oxfordian contains six ammonite biozones: zone of Epipeltoceras bimammatum zone of Perishinctes bifurcatus zone of Gregoryceras transversarium zone of Perisphinctes plicatilis zone of Cardioceras cordatum zone of Quenstedtoceras mariae Brongniart, A.. Gradstein, F. M.. G. & Smith, A. G.. GeoWhen Database - Oxfordian Jurassic-Cretaceous timescale, at the website of the subcommission for stratigraphic information of the ICS Stratigraphic chart of the Upper Jurassic, at the website of Norges Network of offshore records of geology and stratigraphy
Harry Govier Seeley was a British paleontologist. Seeley was born in London, the son of Richard Hovill Seeley and his second wife Mary Govier, he attended classes at the Royal School of Mines, Kensington before becoming an assistant to Adam Sedgwick at the Woodwardian Museum, from 1859. He matriculated as a student at Sidney Sussex College, Cambridge in 1863, he turned down positions both with the British Museum and the Geological Survey of Britain to work on his own. Late in his career he accepted a position as Professor of Geology at King's College and Bedford College, he was Lecturer on Geology and Physiology at Dulwich College and Professor of Geology and Mineralogy at King's College London. He died in Kensington and was buried in Brookwood Cemetery, he had married in daughter of William Mitchell of Bath. Their daughter Maude married Arthur Smith Woodward, FRS. Seeley determined that dinosaurs fell into two great groups, the Saurischia and the Ornithischia, based on the nature of their pelvic bones and joints.
He published his results from a lecture he had delivered the previous year. Paleontologists of his time had been dividing the Dinosauria in various ways, depending on the structure of their feet and the form of their teeth. Seeley's division, has stood the test of time, though the birds have subsequently been found to descend, not from the "bird-hipped" Ornithischia, but from the "lizard-hipped" Saurischia, he found the two groups so distinct that he argued for separate origins: not until the 1980s did new techniques of cladistic analysis show that both groups of dinosaurs did have common ancestors in the Triassic. Seeley named numerous dinosaurs from their fossils in the course of his career, his popular book on pterosaurs, Dragons of the Air, found that the development of birds and pterosaurs paralleled each other. His belief that they had a common origin has been proved, for both are archosaurs, just not as close as he thought, he upset Richard Owen's characterization of the pterosaurs as cold-blooded, sluggish gliders, recognized them as warm-blooded active fliers.
He was elected a Fellow of the Royal Society in June 1879 for his work on reptiles and dinosaurs, delivered their Croonian Lecture in 1887.... He will be best remembered for the wonderful collections he made in the Karoo Beds of South Africa and the resulting exhibition in the Natural History branch of the British Museum of the remarkable skeleton of Pareiasaurus and numerous other Anomodont reptiles.... - see Alfred Brown Works by Harry Seeley at Project Gutenberg Works by or about Harry Seeley at Internet Archive Dragons of the Air Michon Scott, "Harry Govier Seeley" Harry G. Seeley