Methods: Cultural and Archaeological Notes

Archaeological Research Methods

• Definition and Scope of the Field:

  • Anthropological fieldwork traditionally involved traveling to distant regions to study human cultures within their native environmental contexts.

  • Modern field settings have expanded to include diverse locations such as urban environments (urban anthropology), the Internet (visual or virtual anthropology), and collections in university archives or museums (ethnohistory or museum anthropology).

  • Case Example: At Pompeii, Italy, archaeologists work to uncover structures and frescos preserved under volcanic ash following the eruption of Mount Vesuvius in $79\,\text{CE}$.

• Site Surveying and Location:

  • Surveys identify areas containing potential surface artifacts or cultural debris.

  • Methods range from systematic foot surveys across fields to high-altitude technologies including drones and Google Earth to spot unusual topography or structural patterns.

  • Field data collection during surveys includes recording GPS coordinates for cultural debris, documenting local plant and animal species as natural resource indicators, and mapping structural features such as trails, roads, and house pits.

  • Government criteria for defining an official archaeological site vary; a standard threshold in many jurisdictions is finding at least $6$ cultural objects in close proximity.

• Excavation and Grid Systems:

  • Test pits and random sampling of excavation units determine a site's artifact density and potential.

  • Before excavation, sites are divided into measured square sections using a roped grid system.

  • The grid system allows exact mapping and recording of artifacts and features in situ (in their original, undisturbed location).

  • Uncovered items receive catalog or accession numbers written on attached labels.

  • Excavation tools include trowels and toothbrushes to extract delicate materials like bones.

  • Soil samples are gathered for palynological (pollen) analysis.

• Categorization of Archaeological Finds:

  • Artifacts: Portable objects made, modified, or used by humans (e.g., stone tools, pottery, carved bones).

  • Ecofacts: Unmodified natural objects found at a site (e.g., wild seeds, shells, animal bones). These are analyzed by zooarchaeologists (specialists in animal remains) and archaeobotanists (specialists in plant remains and human-plant historical relationships).

  • Features: Non-portable cultural structures (e.g., walls, hearths, house pits, altars, tombs, trails).

• Archaeological Context:

  • Primary Context: The exact location, coordinates, and associations of an object as originally deposited in situ.

  • Secondary Context: The placement of an object that has been moved or disturbed from its primary location by natural forces or human activity prior to documentation.

  • Preserving context is essential for determining the chronological age, function, and cultural significance of artifacts.

  • Case Example: Excavations at Vindolanda, England, have yielded thousands of Roman occupier artifacts dating from $85\text{--}370\,\text{CE}$.

• Relative Dating Methods:

  • Law of Superposition: Formulated by Nicolas Steno in $1669$. States that in undisturbed geological strata (singular: stratum), deeper layers are older than layers above them.

  • Stratigraphic Superposition: The application of the law of superposition to archaeological sites. Assumes artifacts within a stratum, or cutting across strata in a cross-cutting relationship, are younger than the stratum itself unless disturbed by natural events (floods, volcanic eruptions) or biological agents (plants, animals, humans).

  • Historical Application: Distinguishing mammalian megafauna fossils from much older dinosaur bones established early understandings of geological time scales.

  • Archaeological Stratification: Matching specific strata sequences across multiple sites within a region to establish relative chronologies.

  • Typological Sequences: Ordering artifacts by structural and stylistic variations over time (e.g., tracking modifications in Indigenous spearpoint shapes).

  • Seriation: Relative dating technique introduced by Flinders Petrie in the $19\text{th}$ century. Orders artifacts from a single culture chronologically based on stylistic shifts. Petrie applied this to sequence undated Egyptian graves using pottery styles across Naqada I, Naqada II, and Naqada III periods.

  • Cultural Transitions: Stratigraphic and typological shifts mark major eras, such as the Neolithic period ($12{,}000\,\text{BCE}$), characterized by tended soils, cultivated plant pollens, permanent settlements, ceramic storage vessels, population expansion, land and livestock ownership, and regional trade routes.

• Chronometric (Absolute) Dating Methods:

  • Chronometric methods yield specific calendar year ranges based on chemical or physical laboratory analyses.

  • Radiocarbon Dating ($^{14}\text{C}$):

    • Measures the rate of decay of radioactive carbon-14 in dead organic tissues.

    • Applicable to organic samples aged between $300\,\text{and}\,50{,}000\,\text{years}$ (margin of error: $\pm 50\,\text{years}$).

    • Samples must be sealed immediately in nonporous containers to prevent atmospheric organic contamination (dust, pollen, bacteria).

    • Assumes a known half-life for $^{14}\text{C}$-$^{12}\text{C}$ decay and historic constancy in atmospheric carbon exchange.

  • Uranium and Potassium-Argon Dating:

    • Measures atomic decay in nonorganic materials like rocks and minerals.

    • Determines when volcanic layers (lava and ash) were formed, establishing dates for surrounding archaeological layers with matching chemical signatures.

  • Dendrochronology:

    • Measures growth ring patterns in ancient timber ($1\,\text{ring} = 1\,\text{year}$).

    • Cross dating matches ring width variations between living trees and ancient wood samples.

    • Used at Pueblo Bonita in Chaco Canyon, New Mexico, to date Pueblo dwellings to $800\text{--}1150\,\text{CE}$.

    • Assumes single annual ring growth, absence of missing/duplicate rings, and regional climate comparability. Housed at the Laboratory of Tree-Ring Research in Tucson, Arizona.

  • Data Triangulation: Combining multiple relative and chronometric dating techniques to cross-verify the temporal boundaries of a site.

Conservation and Naturalism

• The 19th-Century Conservation Movement:

  • Emerged during the $1860\text{s}$ in Europe and North America to counter environmental destruction driven by human expansion and resource extraction.

  • Driven in part by outdoor recreationists and sporting organizations aiming to preserve hunting, fishing, and wilderness spaces.

  • Led to the establishment of permanent protected areas, including Yellowstone National Park and Yosemite National Park.

• Naturalism and Comparative Collections:

  • Naturalism seeks to explain the physical world via direct observation of natural phenomena.

  • Led to the rapid growth of natural history museum collections containing plant, animal, and geological specimens.

  • Zooarchaeologists and archaeobotanists utilize these comparative skeletal and floral collections (such as those at the Wildlife Forensics Lab in Ashland, Oregon) to identify specimens recovered from human archaeological sites.

• Indigenous Artifact Collections and Criticisms:

  • Museums collected Indigenous art and material objects, such as Northwest Coast totem poles gathered in the late $19\text{th}$ and early $20\text{th}$ centuries (e.g., displays in the foyer of the Auckland Museum in New Zealand).

  • Artifact acquisition occurred via purchase, intermediary traders, or outright theft.

  • Natural history museums built life-sized dioramas placing Indigenous human populations alongside wild animals and taxidermy in

Ethnographic and Qualitative Approaches:

• Ethnography involves immersive observation and participation to understand cultural practices.

• Qualitative methods emphasize narrative, context, and depth in understanding human behavior in archaeological contexts.

• Interviews and oral histories can provide critical insights that complement material findings.

Technological Innovations in Archaeology:

• Advancement in technologies has transformed archaeological methods, enabling more precise and efficient research.

• GIS (Geographic Information Systems) is used to analyze spatial relationships in archaeological sites.

• Remote sensing techniques, such as LiDAR (Light Detection and Ranging), can reveal hidden structures beneath vegetation.

Ethical Considerations in Archaeology:

• The ethical practice of archaeology includes the responsible excavation, preservation, and interpretation of cultural heritage.

• Stakeholder engagement, particularly with Indigenous communities, is essential in decision-making processes about archaeological sites.

• Laws and international agreements, like the UNESCO Convention, guide ethical standards and practices in archaeological work.

Archaeology in the Digital Age:

• Digital archaeology leverages digital tools for documentation and analysis, enhancing public accessibility to archaeological data.

• Virtual reality and augmented reality technologies are being utilized to recreate historical environments and artifacts for educational purposes.

• Online databases and open-access publications foster collaborative research and knowledge sharing among the academic community and the public.