--- title: "Stratigraphic Column | Intro to Archaeology" description: "Stratigraphic Column in Intro to Archaeology shows site layers in order, helping you read relative dates, deposits, and human activity." canonical: "https://fiveable.me/introduction-archaeology/key-terms/stratigraphic-column" type: "key-term" subject: "Intro to Archaeology" unit: "Unit 5" --- # Stratigraphic Column | Intro to Archaeology ## Definition A stratigraphic column is a diagram of the layers at an excavation site, showing their order, thickness, and contents. In Intro to Archaeology, it helps you read relative chronology and figure out how a site formed over time. ## What It Is A stratigraphic column is a diagram that records the layers, or strata, at an archaeological site in the order they were deposited. In Intro to Archaeology, you use it to see how soil, trash, ash, building debris, and other deposits stack up over time, usually with the oldest layers at the bottom and the youngest at the top. Think of it as the site’s vertical history. Each layer can represent a different episode, like a flood deposit, a house floor, a burned layer, a ditch fill, or a layer of everyday refuse. The column does not just show depth, it shows sequence. That means archaeologists can tell which events happened before others, even when they do not have an exact calendar date. A good stratigraphic column usually records more than color and thickness. It may include soil texture, inclusions such as pottery or charcoal, breaks between layers, and signs that a layer was disturbed. Those details matter because archaeology is not just about finding objects, it is about knowing whether those objects were left there when the layer formed or moved there later by digging, erosion, or construction. The basic logic behind a stratigraphic column comes from the principle of superposition, which says that in an undisturbed sequence, lower layers are older than higher ones. That is why archaeologists pay close attention to whether the site has been cut, backfilled, eroded, or reused. A layer can look simple on paper but still represent a messy real-world process in the ground. In class, you may see stratigraphic columns drawn from excavation units or trenches. They are often compared with field notes, plan maps, and artifact distributions. If one layer contains a certain style of pottery or a charcoal lens, the column helps place that evidence in relation to the rest of the site. That makes it one of the main tools for turning dirt layers into a story about human activity. ## Why It Matters A stratigraphic column matters because archaeology depends on context, not just objects. A pot sherd, bone, or stone tool means something different depending on which layer it came from and what else was found with it. The column gives you the frame for interpreting that context, so you can separate an older occupation layer from a later disturbance or rebuilding event. It also gives you a way to build a relative chronology. Even if you do not have radiocarbon dates for every layer, you can still figure out the order of events at a site. That is huge in Intro to Archaeology, where a lot of interpretation starts with questions like, “What came first?” and “Was this deposit part of a living surface, a trash pit, or a later fill?” Stratigraphic columns also help with site formation questions. Archaeologists do not just ask what people left behind, they ask how natural and human processes changed those remains after deposition. A cut, a slump, a hearth, or a flood layer can all reshape the record. Reading the column well helps you spot those processes instead of treating every layer as if it formed neatly and separately. If you are comparing two sites, the column can even support broader regional interpretation. Similar layers might point to shared environmental events, repeated settlement patterns, or changes in land use. So this term is not just about drawing a neat profile, it is about using the ground itself as evidence. ## Connections ### Lithostratigraphy Lithostratigraphy focuses on rock or sediment layers based on their physical characteristics. A stratigraphic column often records those same physical traits, like texture, color, and composition, so lithostratigraphy is one way archaeologists describe what each layer actually is. The connection matters when you need to tell apart natural deposits from cultural ones. ### Chronostratigraphy Chronostratigraphy is about linking layers to time, not just describing what they look like. A stratigraphic column gives the sequence you need first, then chronostratigraphic reasoning helps place those layers into a broader timeline. In archaeology, that can mean connecting a site layer to a period of occupation or a regional phase. ### [Radiocarbon Dating](/introduction-archaeology/key-terms/radiocarbon-dating) Radiocarbon dating gives an absolute age for organic material, while a stratigraphic column gives relative order. You often use them together, because a date from one layer helps anchor the whole sequence. Without the column, a date can be hard to interpret if the sample was disturbed or redeposited. ### [Sequence Stratigraphy](/introduction-archaeology/key-terms/sequence-stratigraphy) Sequence stratigraphy looks at how layers are grouped into larger depositional sequences shaped by changing conditions. In archaeology, that broader lens can help explain why certain cultural layers appear where they do, especially if floods, shoreline shifts, or other environmental changes affected the site. The stratigraphic column is the smaller-scale record you start from. ## On the AP Exam A quiz question might show you a column and ask which layer is oldest, which one was cut by a later feature, or what the sequence of events was at the site. Your job is to read the order of deposits, notice disturbances, and explain what the layer pattern means for relative dating. On short answer or essay prompts, you may need to connect a column to site formation, showing how a hearth, pit, fill, or flood deposit changed the archaeological record. If a question includes artifacts from different levels, use the column to decide whether they belong to the same occupation or to different phases. A strong answer does more than name the layers, it explains how the evidence in the profile supports your interpretation. ## Stratigraphic Column vs Stratigraphy Stratigraphy is the broader study of layered deposits and the relationships between them. A stratigraphic column is the graphic or drawn record of that layering at one site or trench. If stratigraphy is the method of reading layers, the column is the visual product you use to organize and communicate what you found. ## Key Takeaways - A stratigraphic column is a visual record of the layers at an excavation site, arranged in the order they were deposited. - In Intro to Archaeology, it helps you build a relative chronology, even when you do not have an exact date for every layer. - The column matters because context changes meaning, especially when artifacts may have been disturbed, redeposited, or mixed. - Older layers are usually lower than younger layers, but cuts, fills, and erosion can complicate that pattern. - Archaeologists use the column to connect soil layers, features, and artifacts into one site history. ## FAQs ### What is a stratigraphic column in Intro to Archaeology? It is a diagram of the layers at an excavation site, showing their order, thickness, and contents. Archaeologists use it to read the sequence of deposition and reconstruct how the site changed over time. It is one of the main tools for relative dating. ### How is a stratigraphic column different from stratigraphy? Stratigraphy is the study of layered deposits and their relationships. A stratigraphic column is the drawing or chart that records those layers at a specific site. So stratigraphy is the approach, while the column is the visual output you analyze. ### Why do archaeologists care about layers in a site? Because artifacts only make sense in context. A tool found in a living floor, a trash pit, or a disturbed fill layer tells a different story, even if the object itself is the same. The column helps you see which deposits are linked to each other and which ones are later intrusions. ### Can a stratigraphic column show disturbed layers? Yes. It can show cuts, backfill, mixed deposits, erosion, or other disruptions that change the original order of the site. That is why archaeologists do not assume every layer is perfectly neat. Part of the job is spotting where the sequence has been altered. ## Related Study Guides - [5.1 Principles of Stratigraphy](/introduction-archaeology/unit-5/principles-stratigraphy/study-guide/QsO6SlFjprur5Awa) ## About This Document Canonical Fiveable pages are available as Markdown at the same path plus `.md`. - [llms.txt](https://fiveable.me/llms.txt): index of Fiveable's sections and URL patterns - [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing - [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`) - [MCP server for AP teachers](https://fiveable.me/mcp/teachers): a teacher's classes, assignments and AP-rubric grading (`https://fiveable.me/api/mcp/teacher`) ## Structured Data ```json {"@context":"https://schema.org","@graph":[{"@type":"LearningResource","@id":"https://fiveable.me/introduction-archaeology/key-terms/stratigraphic-column#resource","name":"Stratigraphic Column | Intro to Archaeology","url":"https://fiveable.me/introduction-archaeology/key-terms/stratigraphic-column","learningResourceType":"Concept explainer","educationalLevel":"AP® / High School","about":{"@id":"https://fiveable.me/introduction-archaeology/key-terms/stratigraphic-column#term"},"audience":{"@type":"EducationalAudience","educationalRole":"student"},"dateModified":"2026-07-03T02:22:33.889Z","isPartOf":{"@type":"Collection","name":"Intro to Archaeology Key Terms","url":"https://fiveable.me/introduction-archaeology/key-terms"},"publisher":{"@type":"Organization","name":"Fiveable","url":"https://fiveable.me"}},{"@type":"DefinedTerm","@id":"https://fiveable.me/introduction-archaeology/key-terms/stratigraphic-column#term","name":"Stratigraphic Column","description":"A stratigraphic column is a diagram of the layers at an excavation site, showing their order, thickness, and contents. 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