Wednesday, September 28, 2011

Archaeology: What's Hot Now: Bog Bodies

Archaeology: What's Hot Now
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Bog Bodies
Sep 28th 2011, 10:01

Definition:

The term bog bodies (or bog people) is used to refer to human burials, some likely sacrificed, placed within peat bogs of Denmark, Germany, Holland, Britain, and Ireland and naturally mummified. The highly acidic peat acts as a remarkable preservative, leaving the clothing and skin intact, and creating poignant and memorable images of people of the past.

The reason that bogs permit a high level of preservation is because they are both acidic and anaerobic (oxygen-poor). When a body is thrown into a bog, the cold water will hinder putrefaction and insect activity. Sphagnum mosses and the presence of tannin add to the preservation by having anti-bacterial properties.

The total number of bodies pulled from European bogs is unknown, partly because they were were first rediscovered in the 17th century and records are shaky. Estimates range wildly between about 200 to 700. The oldest bog body is Koelbjerg Woman, recovered from a peat bog in Denmark. the most recent dates to about 1000 AD. Most of the bodies were placed in the bogs during the European Iron Age and Roman period, between about 800 BC and AD 200.

Bog Bodies

Denmark: Grauballe Man, Tollund Man, Huldre Fen Woman, Egtved Girl, Trundholm Sun Chariot (not a body, but from a Danish bog all the same)

Germany: Kayhausen Boy

UK: Lindow Man

Ireland: Gallagh Man

Don't forget to try your hand at the Bog Body Quiz

Sources and Recommended Reading

This glossary entry is part of the Dictionary of Archaeology.

Coles, Byrony and Coles, John. 1989. People of the Wetlands: Bogs, Bodies and Lake-Dwellers. London, Thames and Hudson.

Glob, Peter Vilhelm. 2004[1965]. The Bog People: Iron-Age Man Preserved. New York Review of Books, New York.

Lynnerup, Niels 2007 Mummies. Yearbook of Physical Anthropology 50:162-190.

Sanders, Karin. 2009. Bodies in the Bog and the Archaeological Imagination. University of Chicago Press: Chicago. ISBN 13:978-0-226-73404-0 (cloth). 233 pages, plus 82 pages of notes, bibliography and index; 63 black and white photographs.

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Archaeology: What's Hot Now: Burnum (Croatia)

Archaeology: What's Hot Now
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Burnum (Croatia)
Sep 28th 2011, 10:01

Burnum is the Roman name of a settlement and fortified camp on the Krka River in the Sibenik-Knin district of central Croatia, in the hinterland across the Adriatic Sea from Italy. Burnum is called locally "Hollow Church", Å uplja Crkva), but its location on the ancient border between Liburnia and Dalmatia made it a significant military outpost between the pre-Roman and Late Roman periods.

The area was first conquered by the Roman legions during the Illyrian campaigns of the emperor Octavian, sometime between 72-32 BC. Burnum was one of five legionary fortresses established in Illyricum; the others are Tilurium, Siscia, Poetovio and Carnuntum.

A military camp was built first at Burnum during the first century, and, under Hadrian's rule, Burnum attained the status of a city. Burnum was on the Roman Road through Dalmatia. According to Tacitus, garrisons established at Burnum included XX under Augustus, quartered there briefly between battles in AD 9 and XI (AD 33-34), "not too distant to be summoned, should Italy require them"; and, under Claudius, XI Claudia pia Fidelis (AD 42-67) and IV Flavia Felix (AD 56-57).

The municipality of Burnum held a forum, town gates and an amphitheatre. Burnum remained an important center in Roman Dalmatia until it was burned and abandoned at the beginning of the Gothic-Byzantine War of AD 535-554.

Roman Buildings at Burnum

The site of Burnum (sometimes Ivoševci) has not been reoccupied since the sixth century and it is currently an agricultural field. Still extant at the site are elements of the Roman city, including evidence that the site had a square plan, a fortification ditch and a plaza/forum. Two stone arches from the basilica are still present (shown in the photo) out of the original five and a large amphitheater has been recently excavated and restored by the University of Zadar and the Museum of Drniš. An aqueduct flows underground throughout the city, some 30 kilometers in length.

Geophysical investigations, including satellite and aerial imagery, magnetometer survey, electrical resistivity and ground penetrating radar supporting topographic mapping of the Roman features. The investigations led to the discovery that there are significant remaining elements of Burnum buried beneath the surface of the site, including significant portions of the second century AD municipality. These elements include internal roads, public areas and structural complexes, perhaps military barracks and residences.

Archaeology at Burnum

Burnum was first described during the mid-1770s by the Venetian abbot Alberto Fortis. Fortis reported that the standing stone arches were what the locals referred to as the Hollow Church or Trajan's castle. Arthur Evans included a report of Burnum in his 1885 book Ancient Illyria, but did not apparently visit the site. The Austrian Archaeological Institute of Vienna excavated at the site in the early 20th century and again in the 1970s.

Since 2005, Burnum has been under investigation by the Burnum Project, an international project between at the University of Zadar, the Civic Archaeological Museum of Drniš and the Department of Archaeology of Bologna University, under the direction of the Centro Studi per l’Archeologia dell’Adriatico in Ravenna, Italy.

Sources

This glossary entry is a part of the guide to Ruins of the Roman Empire, and the Dictionary of Archaeology.

Boschi F. 2011. Geophysical Survey of the Burnum Archaeological Site, Croatia. Archaeological Prospection 18(2):117-126.

Campell DB. 2006. Roman Legionary Fortresses 27 BC-AD 378. Oxford: Osprey Publishing.

Evans A, and Destani BD. 1885 [2006]. Ancient Illyria: An archaeological exploration. London: I.B. Tauris and Co.

Popovic I. 2010. Silver jewelry of autochthonous style from south and south-east parts of roman province Dalmatia. Starinar 60:95-110.

Zunino A, Benvenuto F, Armadillo E, Bertero M, and Bozzo E. 2009. Iterative deconvolution and semiblind deconvolution methods in magnetic archaeological prospecting. Geophysics 74(4):L43-L51.

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Archaeology: Most Popular Articles: Amelia Earhart's Fate

Archaeology: Most Popular Articles
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Amelia Earhart's Fate
Sep 28th 2011, 10:15

What "the Toms"â€"Willi and Gannonâ€"pointed out to Ric Gillespie back in the '80s was that to a celestial navigator, that last radio message, about flying 157-337, had a very specific meaning. A line from 157 to 337 degrees on the compass is a line perpendicular to the sunrise on the morning of July 2. It's a line that, following standard navigational practice of the day, Noonan would have laid out when he shot the sunrise with his navigational instruments and fixed their position. He then would have advanced that lineâ€"alled the "line of position" or LOP--by dead reckoning along their line of flight until he calculated that they should be within sight of Howland Island. If they couldn't see the island, then they'd simply fly up and down the line until they did see it, or got in contact with the Itasca. And if they didn’t see Howland, didn't contact the cutter? Then there was another bigger island, much more visible than Howland, a couple of hours flying time right down the LOPâ€"an uninhabited island in the Phoenix Island group, at the time called Gardner Island, now called Nikumaroro. That, the Toms proposed, was where Earhart and Noonan had wound up. Nikumaroro today is part of the Republic of Kiribati, pronounced "Kiribas". In Earhart’s day it was part of the British Crown Colony of the Gilbert and Ellice Islands.

Ric and Pat raised the several hundred thousand dollars necessary to get a team to Nikumaroro, and in 1989 we undertook our first archaeological survey. We've been back to the island five times in the last 16 years, and have done research on other islands in the vicinity as well as in Fiji, Tarawa, Funafuti, Australia, New Zealand, Great Britain, the Solomon Islands, and even--to gain comparative data from Lockheed Electra crash sites--in Idaho and Alaska. We haven’t proved the hypothesis to be correct, but we have quite a bit of evidence pointing that way. A lot of that evidence is archaeological.

Evidence From the Village

In 1938, Nikumaroro was colonized as part of the Phoenix Islands Settlement Scheme (yes, the PISS)--an effort to bleed off surplus population from the southern Gilbert Islands into economically self-sufficient coconut plantations in the mostly uninhabited Phoenix group. A village was established near the north end of the island, and in 1940 the colonial administrator, Gerald B. Gallagher, set up his headquarters there. Gallagher died and was buried on the island in 1941, but the colony lasted until 1963 when it succumbed to drought conditions.

The village is a rather ghostly place today. Through the rampant vegetation--coconut, pandanus, a really nasty shrub called Scaevola--you can still see the neat coral-slab curbs that line the dead-straight, seven-meter-wide streets, and the remains of the big flagstaff can still be seen in the middle of the graveled parade ground, next to Gallagher’s grave. Public buildings stood on concrete platforms, which today loom out of the foliage, and the ground is littered with the artifacts of daily life--cans, bottles, dishpans, a bicycle here, a sewing machine there--poking up through the rotting coconuts and palm fronds.

We didn’t plan to do archaeology in the village--an unlikely place to find a big Lockheed Electra or a couple of lost flyers--but as it’s turned out, we've done a bit of work there, and found a lot. To put it simply, the place is crazy with aircraft aluminum, most of it cut into small pieces for use in handicrafts--made into hair combs, used as inlay in woodwork. The colonists were apparently "quarrying" the aluminum somewhere and bringing it to the village. In surveys of specific house sites and in more general walkabouts, we’ve found several dozen little pieces, and a few bigger ones.

Where were they quarrying it? Some of the aluminum is from a B-24; it's got part numbers that match B-24 specifications. A B-24 crashed on Kanton Island, northeast of Nikumaroro, and there was some travel between the islands during and after the War, so the source of these pieces is easily nailed down. But much of the aluminum, especially the small, cut-up pieces, doesn't appear to be military. No serial numbers, no zinc chromate paint. And some pieces have rivets that match those in Earhart's Electra. Four pieces, all from the same part of the village, represent some kind of interior fixture that was nailed to a wooden deck. Until recently we thought they were “dados”--used along the edges of an airplane’s deck to give it a finished look and cover up control cables, but we now think they may be insulating devices, perhaps used to insulate fuel tanks from nearby heater ducts. But we still don't know where any of the apparently non-military aluminum came from.

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Tuesday, September 20, 2011

Archaeology: Mesoamerican Caves

Archaeology
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Mesoamerican Caves
Sep 20th 2011, 08:08

Caves, or underground openings of any sort, are seen as places of great mystery, beauty and creepiness even by us secular modern types. The Maya and other Mesoamerican groups saw caves as the places where the first humans emerged, where the gods resided, where the ancestors returned to after they died.

Entrance of Rio Frio Cave in Belize
Entrance of Rio Frio Cave in Belize. Photo by Russell Harrison

In contributing writer Nicoletta Maestri's new article, Mesoamerican Caves, she describes the ritual meaning of caves and how the people of the various groups in Mesoamerica tended and decorated the caves of Guatemala, Belize and Mexico.

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Archaeology: What's Hot Now: Timing is Everything

Archaeology: What's Hot Now
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Timing is Everything
Sep 20th 2011, 10:00

Archaeological Dating Table of Contents | Part 1: Stratigraphy and Seriation | Part 2: Chronological Markers and Dendrochronology | Part 3: The Radiocarbon Revolution

Absolute dating, the ability to attach a specific chronological date to an object or collection of objects, was a breakthrough for archaeologists. Until the 20th century, with its multiple developments, only relative dates could be determined with any confidence. Since the turn of the century, several methods to measure elapsed time have been discovered.

Chronological Markers

The first and simplest method of absolute dating is using objects with dates inscribed on them, such as coins, or objects associated with historical events or documents. For example, since each Roman emperor had his own face stamped on coins during his realm, and dates for emperor's realms are known from historical records, the date a coin was minted may be discerned by identifying the emperor depicted. Many of the first efforts of archaeology grew out of historical documents--for example, Schliemann looked for Homer's Troy, and Layard went after the Biblical Ninevah--and within the context of a particular site, an object clearly associated with the site and stamped with a date or other identifying clue was perfectly useful.

But there are certainly drawbacks. Outside of the context of a single site or society, a coin's date is useless. And, outside of certain periods in our past, there simply were no chronologically dated objects, or the necessary depth and detail of history that would assist in chronologically dating civilizations. Without those, the archaeologists were in the dark as to the age of various societies. Until the invention of dendrochronology.

Dendrochronology

The use of tree ring data to determine chronological dates, dendrochronology, was first developed in the American southwest by astronomer Andrew Ellicott Douglass. In 1901, Douglass began investigating tree ring growth as an indicator of solar cycles. Douglass believed that solar flares affected climate, and hence the amount of growth a tree might gain in a given year. His research culminated in proving that tree ring width varies with annual rainfall. Not only that, it varies regionally, such that all trees within a specific species and region will show the same relative growth during wet years and dry years. Each tree then, contains a record of rainfall for the length of its life, expressed in density, trace element content, stable isotope composition, and intra-annual growth ring width.

Using local pine trees, Douglass built a 450 year record of the tree ring variability. Clark Wissler, an anthropologist researching Native American groups in the Southwest, recognized the potential for such dating, and brought Douglass subfossil wood from puebloan ruins.

Unfortunately, the wood from the pueblos did not fit into Douglass's record, and over the next 12 years, they searched in vain for a connecting ring pattern, building a second prehistoric sequence of 585 years. In 1929, they found a charred log near Show Low, Arizona, that connected the two patterns. It was now possible to assign a calendar date to archaeological sites in the American southwest for over 1000 years.

Determining calendar rates using dendrochronology is a matter of matching known patterns of light and dark rings to those recorded by Douglass and his successors. Dendrochronology has been extended in the American southwest to 322 BC, by adding increasingly older archaeological samples to the record. There are dendrochronological records for Europe and the Aegean, and the International Tree Ring Database has contributions from 21 different countries.

The main drawback to dendrochronology is its reliance on the existence of relatively long-lived vegetation with annual growth rings. Secondly, annual rainfall is a regional climatic event, and so tree ring dates for the southwest are of no use in other regions of the world.

See the glossary entry for Dendrochronology for more information and a bibliography.

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Archaeology: What's Hot Now: Arrowhead

Archaeology: What's Hot Now
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Arrowhead
Sep 20th 2011, 10:00

Definition:

An arrowhead is the word used by archaeologists and enthusiasts alike to describe the artifact originally fastened to the end of an arrow shaft, whether made of stone, bone, metal or other material. Found as part of an archaeological site assemblage, in isolation on farm fields and in private collections and museums all over the world, an arrowhead is probably the best known artifact of the pastâ€"and a bit misunderstood.

The term "arrowhead" is used by collectors and the general public to describe the tip of any projectile such as a spear or a dart point; but in archaeological science, an arrowhead only refers to the tip of an arrow that was shot by a bow. As a result, some archaeologists prefer to use the term 'arrowpoint' to be more explicit. The general term used by archaeologists for roughly triangular and pointy stone, bone or metal objects attached to any kind of a shaft is 'projectile point'.

Sources and More Information

See the Top Myths and Facts about Arrowheads for more information about what scientists have discovered and what they have so far failed to communicate to the public about arrowheads.

This glossary entry is part of the Guide to Stone Tools and the Dictionary of Archaeology.

Also Known As: bird point (in error; arrowheads can easily kill a deer)

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Archaeology: What's Hot Now: Kilwa Kisiwani

Archaeology: What's Hot Now
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Kilwa Kisiwani
Sep 20th 2011, 10:00

On a small island off the coast of Tanzania lies the site of Kilwa Kisiwani, also called Kilwa (and spelled in Portuguese Quiloa), the most important of about thirty-five trading sites on the Indian Ocean during the 11th through 16th centuries AD. Archaeological investigations at the site began in earnest in 1955, and the site and its sister port Songo Mnara were named UNESCO World Heritage site in 1981.

Kilwa History

The earliest substantial occupation at Kilwa Kisiwani dates to AD 800, and the city became a major trade center from the 1100s to the early 1500s. The site was important during the Shirazi dynasty of the 11th and 12th centuries AD, and under the rule of Ali al-Hasan, a Great Mosque was built, and trade connections to southern Africa and the near and far east were established. Kilwa Kisiwani was one of the principal ports of trade on the Indian Ocean, trading gold, ivory, iron and coconuts from southern Africa, including the Mwene Mutabe south of the Zambezi River, for cloth and jewelry from India, and porcelain from China. The first gold coins struck south of the Sahara after the decline at Aksum were minted at Kilwa Kisiwani, presumably for facilitating international trade. One of them was found at the Mwene Mutabe site of Great Zimbabwe.

Kilwa and Ibn Battuta

The famous Moroccan trader Ibn Battuta visited Kilwa in 1331 during the Mahdali dynasty, when he stayed at the court of al-Hasan ibn Sulaiman Abu'l-Mawahib [ruled 1310-1333]. It was during this period that the major architectural constructions were made, including elaborations of the Great Mosque and the construction of the market complexes of Husuni Kubwa and Husuni Ndogo.

The prosperity of the port city remained intact until the last decades of the 14th century, when turmoil over the ravages of the Black Death took its toll on the international trade. By the early decades of the 15th century, new stone houses and mosques were being built up in Kilwa, but in 1500, Portuguese explorer Pedro Alvares Cabral visited Kilwa, and reported seeing houses made of coral stone, including the ruler's 100-room palace, of Islamic Middle Eastern design. Vasco da Gama arrived in 1502 and exacted tribute to the King of Portugal, and afterwards the city's importance declined, except for a brief florescence during the slave trade of the late 18th century.

Archaeological Studies at Kilwa

Archaeologists became interested in Kilwa because of two 16th century histories about the site, including the now-lost Kilwa Chronicle (although remnants of this document do still exist). Excavators in the 1950s included James Kirkman and Neville Chittick, from the British Institute in Eastern Africa. Scholars believe the Kilwa society developed into the later Swahili societies.

Sources

David Phillipson. 2005. African Archaeology: Third Edition. Cambridge University Press, London.

Mark Horton. 1998. Kilwa. In Oxford Companion to Archaeology, edited by Brian Fagan. Oxford University Press, London.

J.E.G. Sutton. 2002. The Southern Swahili Harbour and Town on Kilwa Island, 800-1800 AD: A chronology of booms and slumps. In The Development of Urbanism from a Global Perspective, an online book available at Uppsala University.

There is also a great article on the architecture and history of Kilwa on the ArchNet site.

Google Earth Placemark for Kilwa Kisiwani

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