V R Switsur
Datos Biográficos
| ID | 4533628 |
|---|---|
| NOMBRE | V R Switsur |
| NOMBRES | V R |
| APELLIDO | Switsur |
| FIRMA | SWITSUR V R |
| AFILIACIONES | University of Cambridge |
| VERIFICADO | No |
| TOTAL DE OBRAS | 19 |
| TOTAL DE CITAS | 63 |
| TOTAL COMO AUTOR | 19 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1965 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 1999 |
| ÍNDICE H | 5 |
A kernel-based Bayesian approach to climatic reconstruction
To understand recent climatic trends and possible future climatic change, it is necessary to examine the nature of past climatic variability. Proxy measures of past climatic fluctuations can be used to extend this record beyond the limited period of instrumental measurements. Regression-based techniques are generally used to define transfer functions, which describe the statistical relationship between these proxy estimates of past climate and me…
Radiocarbon Dating
Years of human impact and vegetation change in the central Peruvian Andes - with events parallelling the Maya record
A lake-sediment sequence from Marcacocha in the central Peruvian Andes provides a well-dated and continuous vegetation record from an area rich in Inca and pre-Inca remains over the last 4000 years. Climatic changes in this record at AD 1-100 and AD 900-1050 seem to be broadly contemporaneous with major arid events from Lake Chichancanab, Mexico, affecting the Maya civilization and corroborated by the Quelccaya and Huascaran ice cores in Peru
High-resolution stable isotope analysis of tree rings
High-resolution stable isotope analyses were carried out on a sample of oak (Quercus petraea) from Cultra, Co Down, UK. A sampling strategy of unparallelled resolution was adopted in an attempt to reconstruct short-term climatic changes during the growing season. The results display a surprising clarity of signal and suggest a significant relationship between δ 13 C and relative humidity and, to a lesser extent, temperature. This preliminary stud…
The Ferriby 5 Boat Fragment
A further small fragment of timber from the North Ferriby boat-site is described and interpreted as the detached top of a cleat from a boat. Radiocarbon dating evidence suggests that it is contemporary with Ferriby 4. The report includes commentary on the use of alder in boat building and the occurrence of integrally formed cleats as housing fur inserted transverse timbers or, in certain circumstances, for the attachment of cords or bindings
Mid-Holocene glacial activity in the Pyrenees
Radiocarbon dating of sediments from a bog at c. 2100 m in the Cirque de Troumouse provides the first reliable dating of Holocene glacier fluctuations in the Pyrenees. The oldest organic material in the bog provides a maximum date (5190 ± 90 BP) for moraines immediately downvalley, which are either Lateglacial or, more probably, Holocene in age. Bracketing dates on laminated glacioacustrine sediments in the bog indicate a Neoglacial event between…
Radiocarbon Ages and Calibrated Dates for the Boats from North Ferriby, Humberside—A Reappraisal
The techniques used for new determinations of the radiocarbon ages of the fragments of boats discovered at North Ferriby are described, together with a demonstration of the application to the results of a computer-based calibration procedure. An interpretation is suggested of the possible calibrated date-ranges thus generated. Archaeological implications of these are considered both in connection with the dates for other British craft that have b…
Cambridge University Natural Radiocarbon Measurements XV
The dates presented in this paper are concerned with studies of the vegetational history of Western Scotland and are research projects in collaboration with members of staff and research students of the Sub-department of Quaternary Research, Cambridge University. The measurements of radioactivity were carried out between 1975 and 1977 at the University Radiocarbon Research Laboratory at Station Road, Cambridge, using highly purified carbon dioxid…
Gussage All Saints-a chronology
In order to obtain a good site chronology the radiocarbon measurements must be carried out on samples having a firm archaeological basis and high probability of association with the event or structure the date of which is required. Patently the radiocarbon date can be no better than the sample provided for measurements, and any missassociation at this stage cannot subsequently be rectified. Often discordant radiocarbon dates are explained away by…
University of Cambridge Natural Radiocarbon Measurements XIV
The dates presented in this paper comprise results of determinations made at the University Radiocarbon Dating Research Laboratory, mostly during the latter half of 1974. Radioactivity was measured with proportional counters using pure carbon dioxide at 2 atmospheres pressure as filling gas. Effects of cosmic and local environmental radiation on the counters were reduced by surrounding them completely with 1) a plastic scintillator anticoincidenc…
University of Cambridge Natural Radiocarbon Measurements XIII
The dates presented here were calculated from measurements made at the University Radiocarbon Dating Research Laboratory mostly during 1973–74. The radioactivity of the samples was counted in gas proportional detectors, either silica lined (de Vries et al , 1959) or of pure copper, filled to 2 atmospheres pressure with pure carbon dioxide. The detectors were fixed in, and completely surrounded by, a plastic scintillator anticoincidence shield mou…
The Excavation of Three ‘Narrow Blade’ Mesolithic Sites in the Southern Pennines, England
Editor's note : Throughout the 1960's Jeffrey Radley was engaged in research on the Mesolithic sites of the southern Pennine area. A report on his excavations at Deepcar was published in the Proceedings of the Prehistoric Society for 1964 (Radley and Mellars 1964) and accounts of further fieldwork undertaken in collaboration with F. Hepworth and G. Marshall appeared in various issues of the Yorkshire Archaeological Journal and the Derbyshire Arch…
Prehistoric Roads and Tracks in Somerset, England
The excavation of the Sweet track at two sites in the Somerset Levels has yielded unique material of the late fourth millennium bc. The track was built across a reed marsh, and the builders used a variety of timber obtained from both nearby fen-wood and from the dry land of the Burtle sand and the Poldens. Pollen analyses indicate that certain areas of the Levels were particularly favourable for forest clearance and cultivation, and the debris fr…
University of Cambridge Natural Radiocarbon Measurements XI
The measurements presented in this paper were carried out at the University Radiocarbon Dating Research Laboratory during the second half of 1971 using carbon dioxide counting. The counting equipment used was substantially that described by Switsur, Hall, and West (1970). Oxidation of samples of sufficiently high carbon content was performed in a stainless steel high pressure combustion bomb, developed at this laboratory, otherwise by ‘wet’ oxida…
University of Cambridge Natural Radiocarbon Measurements XII
The dates presented here comprise results obtained since our last list (R., 1973, v. 15, p. 156-164). Pure carbon dioxide prepared from the samples is used to fill copper proportional counters at two atmospheres pressure. The detectors are protected from environmental radiation by a massive lead shield inside which, and completely surrounding the proportional counters, is a high efficiency plastic scintillation anticoincidence screen (Switsur, Ha…
University of Cambridge Natural Radiocarbon Measurements X
Measurements reported in this paper were obtained in the Cambridge Radiocarbon Dating Laboratory during 1970–71. For most determinations, pure carbon dioxide at a pressure of 2 atm was used to fill the copper proportional counters, of 0.5 L or 1.5 L volume. The counters were protected by a massive lead shield and a plastic scintillation anticoincidence screen (Switsur, Hall, and West, 1970). Modern sample gas was obtained from the 1845 to 1855 gr…
University of Cambridge Natural Radiocarbon Measurements IX
The University of Cambridge Radiocarbon Dating Laboratory has been completely rebuilt and modernized, incorporating new techniques developed here for the various stages of measurements. Sample radioactivity is measured in gas proportional counters after conversion to highly purified CO 2 . Four counters are mounted within a single anticoincidence shield consisting of plastic scintillation material. This is surrounded by a graded cosmic ray shield…
Cambridge University Natural Radiocarbon Measurements VIII
The dates and activity measurements given below have been obtained during 1964 and 1965, and have been made with CO 2 at 3 atm pressure in a proportional gas-counter as described in previous contributions from this laboratory. We have continued to concentrate chiefly upon research projects pursued in the University Sub-department of Quaternary Research
Cambridge University Natural Radiocarbon Measurements VII
The dates and activity measurements given below have been obtained during 1963 and 1964, and have been made with CO 2 at 3 atm pressure in a proportional gas-counter as described in previous contributions from this laboratory. We have again concentrated chiefly upon research projects pursued in the University Sub-department of Quaternary Research, but have continued final determinations also in the series of samples of CO 2 collected in the lower…
The Excavation of Three ‘Narrow Blade’ Mesolithic Sites in the Southern Pennines, England
Editor's note : Throughout the 1960's Jeffrey Radley was engaged in research on the Mesolithic sites of the southern Pennine area. A report on his excavations at Deepcar was published in the Proceedings of the Prehistoric Society for 1964 (Radley and Mellars 1964) and accounts of further fieldwork undertaken in collaboration with F. Hepworth and G. Marshall appeared in various issues of the Yorkshire Archaeological Journal and the Derbyshire Arch…
Prehistoric Roads and Tracks in Somerset, England
The excavation of the Sweet track at two sites in the Somerset Levels has yielded unique material of the late fourth millennium bc. The track was built across a reed marsh, and the builders used a variety of timber obtained from both nearby fen-wood and from the dry land of the Burtle sand and the Poldens. Pollen analyses indicate that certain areas of the Levels were particularly favourable for forest clearance and cultivation, and the debris fr…
University of Cambridge Natural Radiocarbon Measurements IX
The University of Cambridge Radiocarbon Dating Laboratory has been completely rebuilt and modernized, incorporating new techniques developed here for the various stages of measurements. Sample radioactivity is measured in gas proportional counters after conversion to highly purified CO 2 . Four counters are mounted within a single anticoincidence shield consisting of plastic scintillation material. This is surrounded by a graded cosmic ray shield…
Years of human impact and vegetation change in the central Peruvian Andes - with events parallelling the Maya record
A lake-sediment sequence from Marcacocha in the central Peruvian Andes provides a well-dated and continuous vegetation record from an area rich in Inca and pre-Inca remains over the last 4000 years. Climatic changes in this record at AD 1-100 and AD 900-1050 seem to be broadly contemporaneous with major arid events from Lake Chichancanab, Mexico, affecting the Maya civilization and corroborated by the Quelccaya and Huascaran ice cores in Peru
Radiocarbon Ages and Calibrated Dates for the Boats from North Ferriby, Humberside—A Reappraisal
The techniques used for new determinations of the radiocarbon ages of the fragments of boats discovered at North Ferriby are described, together with a demonstration of the application to the results of a computer-based calibration procedure. An interpretation is suggested of the possible calibrated date-ranges thus generated. Archaeological implications of these are considered both in connection with the dates for other British craft that have b…
University of Cambridge Natural Radiocarbon Measurements XII
The dates presented here comprise results obtained since our last list (R., 1973, v. 15, p. 156-164). Pure carbon dioxide prepared from the samples is used to fill copper proportional counters at two atmospheres pressure. The detectors are protected from environmental radiation by a massive lead shield inside which, and completely surrounding the proportional counters, is a high efficiency plastic scintillation anticoincidence screen (Switsur, Ha…
Cambridge University Natural Radiocarbon Measurements VII
The dates and activity measurements given below have been obtained during 1963 and 1964, and have been made with CO 2 at 3 atm pressure in a proportional gas-counter as described in previous contributions from this laboratory. We have again concentrated chiefly upon research projects pursued in the University Sub-department of Quaternary Research, but have continued final determinations also in the series of samples of CO 2 collected in the lower…
High-resolution stable isotope analysis of tree rings
High-resolution stable isotope analyses were carried out on a sample of oak (Quercus petraea) from Cultra, Co Down, UK. A sampling strategy of unparallelled resolution was adopted in an attempt to reconstruct short-term climatic changes during the growing season. The results display a surprising clarity of signal and suggest a significant relationship between δ 13 C and relative humidity and, to a lesser extent, temperature. This preliminary stud…
Cambridge University Natural Radiocarbon Measurements VIII
The dates and activity measurements given below have been obtained during 1964 and 1965, and have been made with CO 2 at 3 atm pressure in a proportional gas-counter as described in previous contributions from this laboratory. We have continued to concentrate chiefly upon research projects pursued in the University Sub-department of Quaternary Research
University of Cambridge Natural Radiocarbon Measurements XI
The measurements presented in this paper were carried out at the University Radiocarbon Dating Research Laboratory during the second half of 1971 using carbon dioxide counting. The counting equipment used was substantially that described by Switsur, Hall, and West (1970). Oxidation of samples of sufficiently high carbon content was performed in a stainless steel high pressure combustion bomb, developed at this laboratory, otherwise by ‘wet’ oxida…
University of Cambridge Natural Radiocarbon Measurements X
Measurements reported in this paper were obtained in the Cambridge Radiocarbon Dating Laboratory during 1970–71. For most determinations, pure carbon dioxide at a pressure of 2 atm was used to fill the copper proportional counters, of 0.5 L or 1.5 L volume. The counters were protected by a massive lead shield and a plastic scintillation anticoincidence screen (Switsur, Hall, and West, 1970). Modern sample gas was obtained from the 1845 to 1855 gr…
The Ferriby 5 Boat Fragment
A further small fragment of timber from the North Ferriby boat-site is described and interpreted as the detached top of a cleat from a boat. Radiocarbon dating evidence suggests that it is contemporary with Ferriby 4. The report includes commentary on the use of alder in boat building and the occurrence of integrally formed cleats as housing fur inserted transverse timbers or, in certain circumstances, for the attachment of cords or bindings
Gussage All Saints-a chronology
In order to obtain a good site chronology the radiocarbon measurements must be carried out on samples having a firm archaeological basis and high probability of association with the event or structure the date of which is required. Patently the radiocarbon date can be no better than the sample provided for measurements, and any missassociation at this stage cannot subsequently be rectified. Often discordant radiocarbon dates are explained away by…
University of Cambridge Natural Radiocarbon Measurements XIV
The dates presented in this paper comprise results of determinations made at the University Radiocarbon Dating Research Laboratory, mostly during the latter half of 1974. Radioactivity was measured with proportional counters using pure carbon dioxide at 2 atmospheres pressure as filling gas. Effects of cosmic and local environmental radiation on the counters were reduced by surrounding them completely with 1) a plastic scintillator anticoincidenc…
University of Cambridge Natural Radiocarbon Measurements XIII
The dates presented here were calculated from measurements made at the University Radiocarbon Dating Research Laboratory mostly during 1973–74. The radioactivity of the samples was counted in gas proportional detectors, either silica lined (de Vries et al , 1959) or of pure copper, filled to 2 atmospheres pressure with pure carbon dioxide. The detectors were fixed in, and completely surrounded by, a plastic scintillator anticoincidence shield mou…
Cambridge University Natural Radiocarbon Measurements VII
The dates and activity measurements given below have been obtained during 1963 and 1964, and have been made with CO 2 at 3 atm pressure in a proportional gas-counter as described in previous contributions from this laboratory. We have again concentrated chiefly upon research projects pursued in the University Sub-department of Quaternary Research, but have continued final determinations also in the series of samples of CO 2 collected in the lower…
Cambridge University Natural Radiocarbon Measurements VIII
The dates and activity measurements given below have been obtained during 1964 and 1965, and have been made with CO 2 at 3 atm pressure in a proportional gas-counter as described in previous contributions from this laboratory. We have continued to concentrate chiefly upon research projects pursued in the University Sub-department of Quaternary Research
University of Cambridge Natural Radiocarbon Measurements IX
The University of Cambridge Radiocarbon Dating Laboratory has been completely rebuilt and modernized, incorporating new techniques developed here for the various stages of measurements. Sample radioactivity is measured in gas proportional counters after conversion to highly purified CO 2 . Four counters are mounted within a single anticoincidence shield consisting of plastic scintillation material. This is surrounded by a graded cosmic ray shield…
University of Cambridge Natural Radiocarbon Measurements X
Measurements reported in this paper were obtained in the Cambridge Radiocarbon Dating Laboratory during 1970–71. For most determinations, pure carbon dioxide at a pressure of 2 atm was used to fill the copper proportional counters, of 0.5 L or 1.5 L volume. The counters were protected by a massive lead shield and a plastic scintillation anticoincidence screen (Switsur, Hall, and West, 1970). Modern sample gas was obtained from the 1845 to 1855 gr…
Prehistoric Roads and Tracks in Somerset, England
The excavation of the Sweet track at two sites in the Somerset Levels has yielded unique material of the late fourth millennium bc. The track was built across a reed marsh, and the builders used a variety of timber obtained from both nearby fen-wood and from the dry land of the Burtle sand and the Poldens. Pollen analyses indicate that certain areas of the Levels were particularly favourable for forest clearance and cultivation, and the debris fr…
University of Cambridge Natural Radiocarbon Measurements XI
The measurements presented in this paper were carried out at the University Radiocarbon Dating Research Laboratory during the second half of 1971 using carbon dioxide counting. The counting equipment used was substantially that described by Switsur, Hall, and West (1970). Oxidation of samples of sufficiently high carbon content was performed in a stainless steel high pressure combustion bomb, developed at this laboratory, otherwise by ‘wet’ oxida…
University of Cambridge Natural Radiocarbon Measurements XII
The dates presented here comprise results obtained since our last list (R., 1973, v. 15, p. 156-164). Pure carbon dioxide prepared from the samples is used to fill copper proportional counters at two atmospheres pressure. The detectors are protected from environmental radiation by a massive lead shield inside which, and completely surrounding the proportional counters, is a high efficiency plastic scintillation anticoincidence screen (Switsur, Ha…
The Excavation of Three ‘Narrow Blade’ Mesolithic Sites in the Southern Pennines, England
Editor's note : Throughout the 1960's Jeffrey Radley was engaged in research on the Mesolithic sites of the southern Pennine area. A report on his excavations at Deepcar was published in the Proceedings of the Prehistoric Society for 1964 (Radley and Mellars 1964) and accounts of further fieldwork undertaken in collaboration with F. Hepworth and G. Marshall appeared in various issues of the Yorkshire Archaeological Journal and the Derbyshire Arch…
University of Cambridge Natural Radiocarbon Measurements XIV
The dates presented in this paper comprise results of determinations made at the University Radiocarbon Dating Research Laboratory, mostly during the latter half of 1974. Radioactivity was measured with proportional counters using pure carbon dioxide at 2 atmospheres pressure as filling gas. Effects of cosmic and local environmental radiation on the counters were reduced by surrounding them completely with 1) a plastic scintillator anticoincidenc…
University of Cambridge Natural Radiocarbon Measurements XIII
The dates presented here were calculated from measurements made at the University Radiocarbon Dating Research Laboratory mostly during 1973–74. The radioactivity of the samples was counted in gas proportional detectors, either silica lined (de Vries et al , 1959) or of pure copper, filled to 2 atmospheres pressure with pure carbon dioxide. The detectors were fixed in, and completely surrounded by, a plastic scintillator anticoincidence shield mou…
Gussage All Saints-a chronology
In order to obtain a good site chronology the radiocarbon measurements must be carried out on samples having a firm archaeological basis and high probability of association with the event or structure the date of which is required. Patently the radiocarbon date can be no better than the sample provided for measurements, and any missassociation at this stage cannot subsequently be rectified. Often discordant radiocarbon dates are explained away by…
Cambridge University Natural Radiocarbon Measurements XV
The dates presented in this paper are concerned with studies of the vegetational history of Western Scotland and are research projects in collaboration with members of staff and research students of the Sub-department of Quaternary Research, Cambridge University. The measurements of radioactivity were carried out between 1975 and 1977 at the University Radiocarbon Research Laboratory at Station Road, Cambridge, using highly purified carbon dioxid…
Radiocarbon Ages and Calibrated Dates for the Boats from North Ferriby, Humberside—A Reappraisal
The techniques used for new determinations of the radiocarbon ages of the fragments of boats discovered at North Ferriby are described, together with a demonstration of the application to the results of a computer-based calibration procedure. An interpretation is suggested of the possible calibrated date-ranges thus generated. Archaeological implications of these are considered both in connection with the dates for other British craft that have b…
Mid-Holocene glacial activity in the Pyrenees
Radiocarbon dating of sediments from a bog at c. 2100 m in the Cirque de Troumouse provides the first reliable dating of Holocene glacier fluctuations in the Pyrenees. The oldest organic material in the bog provides a maximum date (5190 ± 90 BP) for moraines immediately downvalley, which are either Lateglacial or, more probably, Holocene in age. Bracketing dates on laminated glacioacustrine sediments in the bog indicate a Neoglacial event between…
The Ferriby 5 Boat Fragment
A further small fragment of timber from the North Ferriby boat-site is described and interpreted as the detached top of a cleat from a boat. Radiocarbon dating evidence suggests that it is contemporary with Ferriby 4. The report includes commentary on the use of alder in boat building and the occurrence of integrally formed cleats as housing fur inserted transverse timbers or, in certain circumstances, for the attachment of cords or bindings
High-resolution stable isotope analysis of tree rings
High-resolution stable isotope analyses were carried out on a sample of oak (Quercus petraea) from Cultra, Co Down, UK. A sampling strategy of unparallelled resolution was adopted in an attempt to reconstruct short-term climatic changes during the growing season. The results display a surprising clarity of signal and suggest a significant relationship between δ 13 C and relative humidity and, to a lesser extent, temperature. This preliminary stud…
Years of human impact and vegetation change in the central Peruvian Andes - with events parallelling the Maya record
A lake-sediment sequence from Marcacocha in the central Peruvian Andes provides a well-dated and continuous vegetation record from an area rich in Inca and pre-Inca remains over the last 4000 years. Climatic changes in this record at AD 1-100 and AD 900-1050 seem to be broadly contemporaneous with major arid events from Lake Chichancanab, Mexico, affecting the Maya civilization and corroborated by the Quelccaya and Huascaran ice cores in Peru
Radiocarbon Dating
A kernel-based Bayesian approach to climatic reconstruction
To understand recent climatic trends and possible future climatic change, it is necessary to examine the nature of past climatic variability. Proxy measures of past climatic fluctuations can be used to extend this record beyond the limited period of instrumental measurements. Regression-based techniques are generally used to define transfer functions, which describe the statistical relationship between these proxy estimates of past climate and me…
Archaeology (18 obras) · Geology (17 obras) · Geography (14 obras) · Radiocarbon dating (14 obras) · Archaeology and ancient environmental studies (12 obras) · Geology and Paleoclimatology Research (10 obras) · Mineralogy (9 obras) · History (8 obras) · Chemistry (7 obras) · Paleontology (7 obras)