Planning Coastal Fieldwork: Enquiry Questions and Secondary Data

Turning a coastal topic into an investigation

Coastal fieldwork investigates coastal processes through evidence in the landscape. The starting point is an enquiry question: something you want to find out and can answer using evidence from a particular stretch of coast. It connects geographical ideas about processes and landforms to a place you can actually investigate.

‘What are coasts like?’ is too broad to guide a short visit. Questions such as ‘How does beach morphology vary along this beach?’ or ‘How does the geology of this stretch of coast relate to its shape and landforms?’ identify a relationship or pattern to investigate. Beach morphology means the shape of the beach, including its slope.

The question must fit both the location and the task. If the task concerns the relationship between geology and landforms, a coastline containing different mapped geological units offers useful comparisons. If the accessible area contains only one unit, that particular comparison may not be possible. A task about variation in beach shape needs accessible beach sites where measurements can be compared.

Developing a focused question

Begin with the geographical idea, then narrow it to the sites and evidence available. For example, imagine a coastal study area containing several accessible sites and more than one mapped bedrock formation.

• Broad question: Does geology affect coastal landforms?
• Focused enquiry question: How do coastal landforms differ between sites on the two mapped bedrock formations within our study area?
• Aim: To investigate the relationship between mapped bedrock geology and coastal landforms at the selected sites.
• Possible hypothesis: The landforms recorded at sites on one bedrock formation will differ from those recorded on the other.

The aim states what you intend to investigate; the hypothesis predicts what you may find. A hypothesis is not a conclusion decided before the visit. Evidence may support it, partly support it or fail to support it.

The question now guides the evidence needed: geological information to group the sites, and first-hand records of the landforms at each site. These records can later be compared. For a beach-morphology question, measurements of beach shape would be more directly relevant. Choosing evidence because it answers the question is more useful than collecting everything available.

Using secondary data before the visit

Secondary data are information already collected or produced by other people. They help establish the context, choose sites and interpret your own findings. Your own measurements, photographs and field sketches are primary data.

For this coastal investigation, the secondary sources must include a geology map and one other secondary source. The British Geological Survey’s BGS Geology Viewer is an example of a suitable geology-map resource. Other useful sources include historical photographs, aerial photographs, Ordnance Survey maps, weather records and earlier beach-profile data. Choose the additional source for the job it can do in your enquiry, rather than simply because it is available.

Reading a geology map and applying it to site selection

A geology map shows where geological units occur. Its legend links the mapped colours or patterns to their names. Bedrock is the underlying rock; superficial deposits are materials lying above it. These are different layers of information, so a surface deposit should not automatically be treated as the underlying rock.

In the BGS Geology Viewer, tapping the map reveals bedrock and superficial geology. The dynamic legend lists the formations visible in the current map area, and its entries link to further geological details. Different base maps, including satellite imagery, help relate this information to the coastline and your study sites.

The diagram is a fictional teaching example, not a geological survey of a real coast. Reading its legend shows that sites A and B are on the same mapped bedrock unit, while C is on another. Comparing A with C could investigate differences between units; comparing A with B could reveal variation within one unit. The superficial-deposit layer at B is additional information, not a replacement for its bedrock classification.

Transfer this approach to your actual study area by locating each proposed site, identifying its mapped unit from the legend and recording any relevant superficial deposits. Then compare these classifications with your field observations. Different mapped colours identify different units; they do not, by themselves, establish which rock is more resistant or prove why a landform developed.

Map detail also has limits. BGS explains that zooming further into its viewer does not continually increase the resolution of the geological data. A very close view should therefore not be treated as a precise survey of every small exposure or boundary.

Making the second source work for the enquiry

Historical photographs can support a question about landscape change. Compare a photograph taken by someone else at an earlier date with your own record of the same site. Look for identifiable features that allow a fair comparison, such as the position of the cliff edge or the outline of the beach. A difference may provide evidence of change, but differences in viewpoint, tide level or visible coverage can make interpretation uncertain.

Earlier beach-profile measurements offer another route. Comparing them with your measurements at the same location can help investigate whether beach gradient has changed over time. The comparison is stronger when the locations and measurement methods match; seasonal or tidal differences may also affect the interpretation.

For either source, record who produced it, when it was produced and where it represents. Explain what information it adds and how that information helps answer your question.

Keeping the plan realistic

You cannot study every part of a coast, so choose a manageable sample of sites that gives relevant comparisons. Avoid selecting only the places that appear to support your prediction. Record the sites using grid references or GPS locations so that observations and secondary information can be matched.

Accessibility and safety may require changes to the plan. Tide times, weather, slippery rocks, rockfalls and unstable cliffs can restrict where work is possible. If a planned site cannot be used safely, record the change and consider whether the replacement still allows the intended comparison. A good enquiry is focused, evidence-based and feasible within the available time and safe access.