Friday, April 10, 2015

Zooarchaeology


Archaeology often offers a unique opportunity to analyze the human diet based on the recovery of dietary remains.  The analysis of this dietary refuse has yielded some very interesting insights into the human diet.  It has been said that some people live to eat, however, in reality; it is that all people eat to live. In fact, food science is a topic for serious discussion in light of the world’s rising human population - 7  billion + and growing! Not a day goes by when something about food is not the subject of a television or radio news clip or a full-fledged program on food products. As we all know, there’s even a Food Channel! To be sure, more and more households are beginning to grow their own foods while supplementing foods derived from the dairy and meat industries via the corner grocery store. Food is good and . . . . . . . food is necessary!

Upper: Elk antler cut mark modifications zooarchaeological specimen). Eschelman Site Lancaster County, Pennsylvania. Lower: Whitetail deer horn tine with cut mark modifications (zooarchaeological specimen). Both specimens courtesy of the Section of Archaeology, The State Museum of Pennsylvania

In earlier times, when Native peoples were living in North America, diet was also varied, dictated only by what was available for the taking. Indeed, their diet was diverse and included tubers, fruits, nuts and other plant related foods. They also consumed foods taken from the water and surrounding landscape such as fin fish, shellfish, birds, mammals, amphibians, reptiles - and of course, snails and insects. This brings us to this week’s TWIPA topic of zooarchaeology (and the letter Z, last letter in the current alphabetical sequence) so we will begin by briefly featuring several archaeological sites where animal bones have been studied.

Skeletal diagram of white tail deer showing butcher mark locations for dismembering the animal. Courtesy the Pennsylvania Archaeologist

A growing body of archaeological information in Pennsylvania is yielding quite an impressive inventory of animal foods that were among the many available sources for Native peoples . For example, Meadowcroft Rockshelter (36WH297) located in the Cross Creek drainage of southwestern Pennsylvania, in Washington County is considered to be the oldest continually occupied stratified rockshelter in North America. It contained 115,166 bones representing 5,634 individual vertebrate and 38 different snail and shellfish species. Many of the smaller remains, however, were dropped by raptors from the cliff face only to be recovered by archaeologists investigating the site from the stratified deposits thousands of years later (Guilday and Parmalee 1982; Lord 1982).

Upper: White tail deer skull (female), Elk County, Pennsylvania. James F. Herbstritt osteological collection. Lower: White tail deer (zooarchaeological specimen). Eschelman Site Lancaster County, Pennsylvania, Both images courtesy The State Museum of Pennsylvania

Numerous animal remains from another rockshelter, now trapped beneath Lake Raystown in the Juniata Valley, were reported from the Sheep Rock Shelter (36HU1) in Huntingdon County, Pennsylvania. In a joint field school, Juniata College and the Pennsylvania State University excavated at the Sheep Rock Shelter in 1958, 1959 and 1961 (Michels 1994). During the mid-1960’s Guilday and Permalee (1965) after analyzing 35,000 faunal remains from the site, identified 38 species of mammals (4,099 bones); 7 species of fin fish (1,091 bones); 40 species of birds (1,693 bones); 12 species of reptiles (1319 bones); 2 species of amphibians (719 bones) and 13 shell fish species were present. This list represents at least 99 vertebrate and 15 invertebrate species, all native to southcentral Pennsylvania in prehistoric times.

Whitetail deer humeri (zooarchaeological specimen)showing butcher mark areas outlined in red. Eschelman Site, Lancaster County, Pa. Courtesy the Section of Archaeology, The State Museum of Pennsylvania

Two additional archaeological sites, Quaker Hill Quarry (36LA1100) and Eschelman Site (36LA12) a part of the Washington Boro Village site, are included in this week’s TWIPA  feature that relate to zooarchaeological studies. These lower Susquehanna valley villages date from the mid- 16th century to the early 17th century, a period in a time when actual face-to-face encounters with Europeans had not yet occurred.

Diagram of Mountain Lion humerus showing cut marks (1 and 2). Eschelman Site. Courtesy the Pennsylvania Archaeologist

Subsistence data for the Quaker Hill Quarry site, a fortified Funk Phase Shenks Ferry village, was obtained during data recovery operations that ended in 2009. A sampling of refuse pits from the four acre village site yielded fewer large mammals than expected for a significant permanent village site of the 16th century. The water and/or chemical separation (flotation method) was used over the course of the field study and proved to be worthwhile in recovering small bones, fish scales and other minute-size specimens. This method yielded the most comprehensive archaeo-faunal assemblage from a Shenks Ferry village site to date where more than 21,800 bone elements representing 42 aquatic, avian and terrestrial vertebrate/invertebrate species (Whyte 2005) were analyzed.

Bob Cat skull, Elk County, Pa.  James F. Herbstritt osteological collection. Courtesy the Section of Zoology and Botany, The State Museum of Pennsylvania

The Eschelman Site is a fortified Susquehannock village in the town of Washington Boro, Lancaster County,Pennsylvania. In 1949 the site was explored and identified as one of the dump sites where the Susquehannocks discarded their village trash (Kent 1984). Later on, zooarchaeological studies by Guilday, Parmalee and Tanner (1962) identified over 58,000 bone fragments – many of the mammals such as deer, bear, mountain lion, wolf, gray fox, bobcat and dog displayed the telltale signs of butcher marks indicating that such animals were skinned, stripped of their meat and used for food. In addition, there were 26 species of mammals; 33 bird species; 5 species of reptile; 2 amphibian; and 7 fish, respectively.

Junior archaeologist assisting with the recording of a historic period dog burial at Fort Hunter Mansion and Park, Courtesy The Section of Archaeology State Museum of Pennsylvania

In summary, zooarchaeological studies of bones provide us with a glimpse into the past where animals were an essential aspect of Native people’s diets.  Analysis of the dietary refuse of the past has provided us with a more complete picture of human survival.  These changes and adaptation in our diets are a reflection of  environmental and settlement pattern changes which have occurred over time. In tandem with wild and cultivated plant products these protein foods provided the necessary nourishment to sustain life and well-being at a time when the supermarket’s butcher shop was a thing of the future.


References
Guilday, John E., Paul W. Parmalee and Donald P. Tanner
1962       Aboriginal Butchering Techniques at the Eschelman Site (36LA12), Lancaster County, Pennsylvania. Pennsylvania Archaeologist 32(2):59-83.

Guilday, John E. and Paul W. Parmalee
1965       Animal Remains from the Sheep Rock Shelter (36HU1), Huntingdon County, Pennsylvania. Pennsylvania Archaeologist 35(1):34-49.

Guilday, John E. and Paul W. Parmalee
1982       Vertebrate Faunal Remains from the Meadowcroft Rockshelter, Washington County, Pennsylvania: A Summary and Interpretation. In: Meadowcroft: Collected Papers on the Archaeology of Meadowcroft Rockshelter and the Cross Creek Drainage. Edited by Ronald C. Carlisle and James M. Adovasio.

Kent, Barry C.
1984       Susquehanna’s Indians. Anthropological Series No.6. Pennsylvania Historical and Museum Commission

Lord, K.
1982       Invertebrate Faunal Remains from Meadowcroft Rockshelter, Washington County, Southwestern Pennsylvania. In: Meadowcroft: Collected Papers on the Archaeology of Meadowcroft Rockshelter and the Cross Creek Drainage. Edited by Ronald C. Carlisle and James M. Adovasio.

Michels, Joseph W.
1994       Excavations at the Sheep Rock Shelter (36HU1): An Historical Review. Pennsylvania Archaeologist 64(1):28-40.

Whyte, Thomas R.

2005       Vertebrate Archaeofaunal Remains from Site 36LA1100, The Stabler Tract Project, Lancaster County, Pennsylvania. Report submitted to the Pennsylvania Historical and Museum Commission, Bureau for Historic Preservation.


For more information, visit PAarchaeology.state.pa.us or the Hall of Anthropology and Archaeology at The State Museum of Pennsylvania .

Friday, March 27, 2015

Why the Y in Archaeology is so important

This week our letter is Y and in thinking of topics to cover it occurred to us that perhaps instead of looking at words beginning with the letter Y, we should look at words ending in “y”.  The obvious choice then is the” y” in archaeology.  Archaeology is a science and by mere definition its suffix meansthe scientific study of a particular subject  (Cambridge Dictionary). Archaeology is the study of past human behavior and culture through the systematic recovery and analysis of material remains or objects. Archaeology is a subfield of Anthropology which is the study of all human cultures.  Archaeology is the only discipline that examines all times periods and all geographic regions inhabited by humans. It is through this discipline that we are able to examine patterns of human behavior and how and why cultures change or adapt over time. Making archaeology and anthropology relevant to the general public is our goal and often our biggest challenge. 

Measuring and recording a fire cracked rock feature; evidence of a prehistoric cooking hearth

Archaeologists examine the past through the analysis of remains left by human activity.  We often discuss artifacts that are recovered during excavations in our blogs, but there are also features or cultural activity that is apparent in soils.  Examples include post holes from house structures, fire cracked rock from hearths and refuse pits for discarding of food waste. Artifacts represent the tangible remains of past human activity and are more likely to evoke an emotional bond with other cultures for the general public, but we require more than an artifact to understand its significance. The story or picture of the past is created through multiple processes including analysis of soil disturbances and the artifacts associated with those activities.  Systematic comparative analysis of multiple examples of the same type of artifact provides us with a better understanding of the object’s meaning or function and enables us to make those objects relevant to a broader audience.
   
archaeological evidence of a house structure dating from the Late Woodland (1550 AD-1000BP) period


Why is archaeology or our cultural heritage important or relative to you and me today? Because as our world changes and we are introduced to other cultures and other perspectives we must have an understanding and appreciation for past human behavior in order to value everyone’s place in society.  Archaeology provides an unbiased description of the past that historians often do not. History is often biased by those who record the events, but archaeology reveals the events based on the scientific evidence. An example of archaeology revealing a more accurate picture of the past is the archaeological evidence of survival at the site of Jamestown in Virginia. (hyperlink http://historicjamestowne.org/archaeology/jane/ ) Understanding how and why cultures have changed in the past, the events or circumstances that evoked those changes provides answers to how we might better adapt to changes in the future.

Isis attack on a museum in Mosul in northern Iraq (image NBCnews.com)

The destruction of historic and archaeological resources is occurring at an alarming rate and while archaeologists understand the significance of these sites, others often do not.  Most of us are concerned by recent attacks on historic sites in the Middle East, and fear for the survival of artifacts that represent thousands of years of cultural development. Unfortunately, these acts of destruction are not the first time groups have chosen to destroy evidence of the past and it will likely not be the last.  The loss of these resources is painful, but when we consider that cultures have survived these events in the past, we can find hope in their continued survival.  Archaeology and anthropology are important tools in understanding our cultural heritage and provide many of the answers society desires in dealing with the future.

Intern Tam Eichelberger analyzing stone axes in the Science Lab of The State Museum of Pennsylvania

Refit analysis of debitage improves our understanding of lithic technology and stone tool produciton

In summary, the importance of the letter “y” in archaeology is that it depends on “you”. You are the individuals that can value archaeology and our heritage. You are the individuals we want to inspire to learn from the past and for whom we offer museum exhibits and public programming. We hope you will take a few minutes to examine your cultural heritage and the impact that archaeology has provided in understanding our past. Help us to insure that our archaeological heritage is preserved by supporting public programs and preservation laws so that we can protect the past for future generations.

 “Prepare for the unknown by studying how others in the past have coped with the unforeseeable and the unpredictable.” ― George S. Patton


 “Those who cannot remember the past are condemned to repeat it.”  George Santayana ,The Life of Reason, 1905 

For more information, visit PAarchaeology.state.pa.us or the Hall of Anthropology and Archaeology at The State Museum of Pennsylvania .

Friday, March 13, 2015

Groovin' with stone axes

This week in our alphabetical trip through Pennsylvania archaeology, we have reached the letter “X”; and, to keep it simple, “X” stands for axes, specifically stone axes.

Axes are one of several hafted stone tool types that are differentiated by the angle at which the head is seated. An axe blade or head, is hafted parallel to the handle rather than perpendicular to the handle as in hoes or adzes. There are two basic axe forms; chipped axes and pecked and polished axes. Chipped axes have two opposing notches and the notches were used in the hafting process. They are relatively simple to make and were used during many time periods in prehistory. Ground and polished axes are grooved for securing the head to the handle. A full grooved axe has a groove that encircles the entire piece. On the ¾ grooved axes, the groove does not extend to the bottom side.

chipped axe

sketch of full grooved axe

sketch of 3/4 grooved axe

Ground and polished axes frequently start out as river cobbles that were chosen for their general size and shape. Metamorphosed siltstone or sandstone, basalt or diabase was frequently used and sometimes quartzite. Depending on the degree of stone that needed to be removed to reach the desired shape, axes are first chipped to remove excess material or if only a small amount of material needs to be removed, they are pecked into shape. The pecking process involves using a stone hammer and repeatedly but carefully striking the axe blank, removing small pieces of the surface. The groove formed early in the manufacturing process. Once the entire surface was pecked to the desired shape, the axe blank was rubbed on a piece of sandstone to smooth the surface. Although not found in Pennsylvania, special axe grinding slabs have been found in the western United States. In order to attain a very high polish, the final rubbing takes place on a charred piece of wood.  

groove started on an axe blank

Full grooved and ¾ grooved axes were hafted slightly differently as can be observed in the figure below. The functional differences, however, are not clear. In addition, sometimes the groove is bordered by a ridge on one or both sides and sometime there is a double groove. It is assumed that this was part of the hafting method but again, the functional differences are not clear. Depending on the hardness of the stone, the manufacturing process for a full grooved and completely polished axe required 30 to 60 hours of work.

sketch of hafted axes

finished full groove axe

finished 3/4 grooved axe

double grooved axe

Axes were sharpened by simply grinding down the bit end as it became worn. Most of the axes in The State Museum collection are broken or worn down, nearing the end of their use life. However, some are very large (see below) and some of the unfinished pieces are extremely heavy weighing 4445 gr or 10 pounds and measuring 39 cm or 15 inches in length.

large finished full grooved axe

longest axe

 heaviest axe

Native Americans have been using axes to cut wood ever since they arrived in North America. However, during the Paleoindian period (11,700 - 20,000 BP.) they are neither notched or polished and difficult to identify unless systematic microwear studies are conducted. It is not until the Middle Archaic period (6850 – 10,200 BP.) that ground and polished axes are produced. Full grooved axes are the earliest and ¾ grooved axes do not appear until the (Late Archaic 4850 – 6850 BP.) and become common during the Transitional period (2800 – 4850 BP.).

            The State Museum is initiating an inventory and preliminary analysis of its unprovenienced collection of grooved and chipped stone axes. This group of artifacts was received as part of various donated collections such as those from Gerald Fenstermaker and Samuel Farver and are not located by specific site. They are primarily from eastern Pennsylvania and mainly the Susquehanna drainage basin. Up until a month ago, they were stored in boxes and underutilized. For exhibit or research purposes, we didn’t know what we had unless we inventoried and catalogued all 54 boxes. Our goal is to make a list of all that we have, catalogue them by type and take some basic measurements to determine variations in size, breakage patterns, how they were made and the lithic materials that were used. Our intern this semester, Tamara Eichelberger from Elizabethtown College, has volunteered to process the collection. Although they had been washed sometime in the past, over 40 years of dust had accumulated so they needed to be wiped clean. Since each will be measured and entered into a data base, each needs an individual catalogue and specimen number. With the help of volunteers, Tamara is completing the labeling process and will begin taking measurements next week. There are over 500 specimens in the collection so she should be able to develop a good characterization of axes from eastern Pennsylvania. The results of her analysis will be the subject of a blog in early May.

Tam and her axes

Additional reading

Adams Jenny L.

2014    Ground Stone Analysis: A Technological Approach. The University of Utah Press, Salt Lake City. 


For more information, visit PAarchaeology.state.pa.us or the Hall of Anthropology and Archaeology at The State Museum of Pennsylvania .