Methods to Discover Archaeological Sites

Methods to Discover archeological SitesWhat be the main methods utilise to intermit archeological internet sites in the solid g travelscape? Critically assess the pros and cons of the methods you fall upon using relevant examples.The archaeologist uses a range of techniques to actively discover and locate archeological sites within the cut backscape these methods argon non-invasive and non-destructive and fall into quartette patient of categoriesDesk Top surveys Surface SurveysGeophysical and Geo chemical surveys visionary Surveys (Grant et al, 2002. p5).In growth to these, almost sites may be discovered by chance, for example when quarrying, dredging and peat great or simply by(p) in walking in the write downscape. These broad categories all complement each other and the or so relevant methods in each case go away depend on the terrain of the ara be investigated and the resources and fourth dimension gettable for investigation. Also, the questions being as ked and the degree of accuracy required will have an effect on how these techniques are used (Greene. 1991. p54).Desk Top SurveysThe desk communicate survey is office based and uses existing documents such as maps, historic documents, previous archaeological records, pictures and literature, all of which tummy all provide hints and references to archaeological sites. Maps tooshie be used to locate sites, and are among the most sanctioned resources available to the archaeologist. Early 16th century maps are not unceasingly to scale but fanny be rattling reusable, Ordnance Survey started publishing maps in the early 19th century and, by analysing a succession of maps of an area, a great deal idler be learnt from the changes in use of the land and mental synthesiss. (Grant et al, 2002. p8). Old bill maps and terriers, usually ready amongst the deeds and papers relating to the will power and management of estates and properties, may wisecrack insight about forgotten sites (Barker, 1993). Although the majority of early records have not survived, there is still a bulky range of available which the archaeologist may find of value. Legal records, including wills and chat up records, can provide boundaries of ownership and clues to the functions of buildings. The Domesday Book and other tax records and tithe awards can identify the economic use and boundaries of land,Pictorial records such photographs paintings, and engravings, and descriptive accounts written in books, diaries and travelogues can all be of value. Of particular lodge in is the work of William Stukeley (1687 1785), an accurate and observant recorder who travelled extensively end-to-end Britain, and William Camden (1551 1623),whose thorough and expatiate descriptions were published in the first general impart to the antiquities in Britain, Britannia in 1585 (Greene pp24 27). These records can be freely found in museums, libraries and private collections and may offer a rare recor d of an archaeological feature. Details of any previous archaeological excavations, finds and previous survey results are all held in local SMR and national NMR offices and can offer insight into possible sites for exploration.There is often much truth hole-and-corner(a) in the legends and stories of antiquity and a study of these may provide a clue to a forgotten or place. Most traditions and myths are founded on real the great unwashed and places which, over time, can become exaggerated and unbelievable. (Grant et al. 2002. p8). By sifting the embellishment from these legends the archaeologist is often left with a encouraging factual narrative. This is a cheap and effective way of gleaning nurture, but it can be time consuming. During interviews with local residents in Kythera, Greece a vast amount of anecdotal information was generated on the use of the landscape of the island, its abandonment and reuse, and the connections between people, villages and churches which all help ed to place archaeological work into context (Johnson Wilson. 2003).The desk top survey is of particular value where investigations are part of the planning process to reassure whether there are likely to be archaeological remains which could be lost or threatened as a part of the building and development of the land. (Grant et al 2002. p6). Many historical records are free to chafe and can be found in libraries, museums, County Records and Archives Offices, on the internet, at Local and National Sites and Monuments Records offices and in private collections.Surface SurveysThese are opthalmic surveys which seek to find traces of possible sites and are carried out, most usually, on foot. A fall out survey can be systematic or unsystematic, although the most commonly used, is a systematic approach (Renfrew Bahn. 2008. p78). The purpose is to make a survey of archaeological finds within an area to delineate if they might charge up to past human application (Lynch. 2006). A gri d is normally rigid out on the ground to aid mapping and a police squad of walkers go over each area on the grid, recording sites and finds. The general record of the types and scatter of the artefacts found can give a wide-cut idea of the age of a site and its possible previous uses (Adkins et al 2008).Fieldwalking is an effective and relatively cheap way of surveying land and has a vital place in the stripping of archaeological sites. Once the finds are set and analysed, the data can also help to provide information about the date of a site and its possible functions. Results are in general more reliable where the region is walked repeatedly as a broad term project (Renfrew Bahn. 2008. p 79). It does have some limitations in that several(predicate) fieldwalkers may have differential types of collection across the same sight. Fieldwalking works best on arable land, but needs to be carried out at times in the arable cycle when vegetation is low. (Grant 2002). Tesserae fou nd during field walking at Rowler Manor in Croughton, Northamptonshire led to the discovery in 1991 of a roman type Villa along with a mosaic paving material (Dawson, 2008)Geochemical and Geophysical SurveysThe activity of humans significantly alters the geochemical com amaze of soil, and the archaeologist can use chemical testing to determine areas of alteration to the soil by human activity.The most common geophysical test is phosphate analysis. This chemical is present in most living things and the presence of domesticated animals, people and plants in a landscape will increase the concentration of phosphates in that landscape. Areas of high saturation of phosphates can then be explored further to discover the significance of the activity (Renfrew Bahn. 2008. p105). At Plas Gogerddan, Ceredigion in Wales, geochemical analysis was used to determine that burials on this Early Christian Burial site could be identified using phosphate analysis and possible grave sites of further b urials were save (Murphy 1992).Geophysical surveying has developed considerably over the last hardly a(prenominal) years and is used with great success in archaeological site prospection. There are two main methods of geophysical surveying, these are galvanising resistively and magnetometery (Bowden 1999. p 120).Resistivity surveying involves passing an electrical current by probes set into the ground, and is based on the expertness of sub-surface materials to conduct that current, Generally, higher exemption features such as buried walls have a limited moisture content and infilled ditches and pits which retain moisture will give lower readings. (Reference)The technique is especially suited to the discovery of stone structures. Its success is restoreed by local geology and also the weather conditions. Very dry or very wet conditions, as well as variations in the temperature can affect the quality of the results as they affect rate of flow of the electric current. The elect ric resistance equipment is heavy to use and the survey can take some time to complete, but this is a cost effective method of survey.Magnetised weigh oxides are present in the soil and past human activity alters and redistributes these, creating stronger and weaker responses which can be detected as magnetic anomalies.It is very man-portable and good for rapid surveying of land. The results produced can be very detailed and they are very useful for identifying buried ditches, pits, kilns and hearths. (Reference)The subsoil of the land can influence the results the most responsive soils being are chalks and limestone. Igneous subsoils are the most difficult to investigate with this technique and the results on clay soils can be erratic.Resistivity and magnetometry techniques were used in karstic terrains in County Cork, Ireland, which identified the position of a previously unknown cave (Gibson et al, 2004).A number of newer techniques including build Penetrating Radar (GPR) and Geographic Information Systems (GIS) are also available and becoming popular tools for the archaeologist. GPR was developed for use in defence and engineering. It is an high-priced process and is of greatest value where buried deposits are close to the surface of the soil. It has the benefit that it can take readings through tarmac surfaces, and therefore is useful in urban environments (Grant et al. 2002). GIS is a powerful computerised mapping system with the ability to analyse quantitative data, which is useful for plotting scatters of finds and test hypothesis. GIS was effectively used at Tel Shiqmona, Israel, to conduct coastal and marine surveys and to evaluate the potential of Maritime trade with the Phoenicians (Breman. 2003)Aerial SurveysThe use of aired photography was pioneered by O G S Crawford, an Archaeologist and Observer in the Royal Flying army corps during Word War 1. Crop mark, soil attach and shadow marks all cause patterns which can be observed from the ai r. Most aerial photographs for archaeology use are taken at an oblique shift which give better views of a site, although they do distort the perspective. It is important to accept a landmark in the photographs in order to provide a fixed point for mapping a site (Riley 1982).Aerial crack of Crook Laithe Settlement, Linton, YorkshireThis technique is most effective on arable land and upland areas, least effective on heavily ploughed land and ineffective on heavily built up areas and land with tensile covering over crops. Aerial photography is valuable to the archaeologist and an immense number of archaeological discoveries have been made using this method (Riley, 1982). In a survey in Augacatel, Mexico, where heavy jungle prohibited the economical use of ground surveys, 25 photographs were taken revealing up to 63 possible man made structures (Matheny, 1962)The weather conditions are important and photographs are best taken when the sun is low in the sky (early morn or evening) on a clear day, as the shadow marks will show up best under these conditions (Adkins 2002). The costs of flight of stairs are expensive, but since the equipment and film are comparatively cheap and wide-ranging distances may be covered in one flight, this is an effective and polar technique to employ in archaeological prospection.In addition to these techniques, some sites are discovered quite by chance. In 1985, a farmer found a number of bones and a small round lead object on a sandbank in Orkney. After demonstrate his finds to an archaeologist, this lead to the discovery of a Viking boat burial (Towrie 2010). Whilst digging a well, some peasants unearthed fragments of terracotta, which lead to the discovery of arguably, one of the most spectacular discoveries of the twentieth century, The Terracotta ground forces of Qin Shi Huang in China (Tianchou 1996).The high cost of archaeological excavations retrieve that it is important for the archaeologist to know where to dig in order to avert expensive mistakes. The techniques outlined above all assist the archaeologist in the discovery of sites in the landscape, so that future excavations can be carried out in the most cost and time effective manner.It is remarkable how much can be revealed about a site without excavation (Greene 1991. p 42).ReferencesAdkins, R L and Leitch, V. 2008. The Handbook of British archeology (revised edition). London. Constable Robinson Ltd.Barker, Philip. 1993. Techniques of Archaeological Excavation. 3rd Edition. London. B.T. Batsford Ltd.Bowden, Mark (Ed.). 1999. Unravelling the Landscape. An Inquisitive Approach to Archaeology. Stroud. Tempus Publishing Ltd.Breman, J. Journal of GIS in Archaeology. mint I. APRIL, 2003. Marine Archaeology goes Underwater with GIS.Dawson, M. 2008. Northamptonshire Archaeology. Vol 35 2008. Excavation of the Roman Villa and Mosaic at Rowler Manor, Croughton, Northamptonshire p 45 93Gibson, P.J. Lyle P., George D.M. Aug 2004 Journal of we aken and Karst Studies, v. 66, no. 2, p. 35-38. Application of resistivity and magnetometry geophysical techniques for near-surface investigations in karstic terrains in Ireland.Grant, J. Gorin, S. Fleming, N. 2002 The Archaeology Coursebook. London, RoutledgeGreene, Kevin, 1991. Archaeology. An Introduction (Revised Edition). London, B T Batsford Ltd.Johnson, I Wilson, A. Journal of GIS in Archaeology. Volume I. APRIL, 2003. Making the Most of Maps Field Survey on the Island of KytheraLynch, Tim. Nov 2006, British heritage Vol. 27 Issue 5, p52-54, 3pMatheny, R.T. American Antiquity, Vol. 28, No. 2 (Oct., 1962), pp. 226-230. Value of Aerial Photography in Surveying Archaeological Sites in Coastal jungle RegionsPublished by Society for American Archaeology Murphy, K. (1992) Archaeological Journal, Vol 149, pp. 1-38.Renfrew, C Bahn, P. 2008. Archaeology Theories, Methods and Practice. (5th Edition). London, Thames and Hudson Ltd.Riley, D.N. 1982. Aerial Archaeology in Britain. Ay lesbury, Shire Publications Limited.Tianchou, Fu (ed.) 1996. The Underground Army of Emperor Qin Shi Huang. Beijung. New World PressTowrie, Sigurd 2010. The Orkney Jar. http//www.orkneyjar.com/history/scarboat/index.html accessed 8th March2010