excavation methods

The governing concept is matching a sampling design to the research question. Systematic sampling places trenches or sample units at regular, planned intervals, giving different parts of a site a comparable chance of representation and supporting an unbiased distributional study. Option A is correct. A known building or single grave calls for purposive selection, while a tiny site that can be fully excavated needs no sampling design at all.

The governing concept is primary versus secondary deposition. Artefacts found downslope may have been displaced from their original context by running water, soil erosion, gravity, or cultivation. Therefore, the concentration at the lowest point does not automatically mark the settlement centre. Option B is correct because the surveyor must examine slope, drainage, soil movement, and other evidence before locating the original habitation. Options A and C ignore geomorphological movement, while D is unsupported.

The governing concept is stratigraphic integrity. If artefacts from widely separated periods occur in one layer, the deposit may have been disturbed by ploughing, a later pit, animal burrows, construction, or natural soil movement. Option B is correct because disturbance can mix materials that were originally deposited at different times. Pottery production may assist dating, but it does not explain the mixed layer; royal control and site planning are unrelated to this immediate taphonomic problem.

The governing principle is secure stratigraphic dating, including the latest secure find or terminus post quem. A layer can only be dated from its latest artefact if that artefact was deposited with the layer and was not introduced later through a pit, burrow, erosion, or other intrusion. Option A is correct. Beauty, material, and depth do not establish chronological reliability; even a deep layer may contain later intrusive material.

The governing concept is relative chronology based on stratigraphic superposition. A wall resting on or cutting into an existing layer must have been constructed after that layer had formed, so option B is correct. The dated layer provides a terminus post quem, or earliest possible time, rather than the wall's exact construction date. The wall could have been built much later. Options A and C reverse or overstate the evidence, while D confuses a chronological limit with a precise date.

The governing concept is context recording and depositional sequence. A pit may have been filled in several episodes, and separate fills can preserve different artefacts, dates, or activities. If all fills are recorded as one unit, the archaeologist cannot reliably reconstruct the order of dumping, reuse, or abandonment. Option A is correct. Site orientation, pottery colour, and datum elevation may still be recorded separately, but they do not answer the specific interpretive problem created by combining fills.

The governing concept is architectural phasing. Different brick bonding may reflect different builders, functions, repairs, or construction periods, but it is not conclusive by itself. Option B is correct because the junction, foundation relationship, abutment, superposition, and associated deposits can show which wall came first and whether one replaced or reused the other. Options A and D assume a date without evidence, while C would destroy valuable archaeological context.

The governing concept is the stratigraphic law of superposition and cutting relationships: a feature that cuts or removes another feature must be later than the material it cuts. Therefore, option C is correct—the floor existed first and the wall was constructed afterward. This establishes relative order, not an exact calendar date. Options A and B contradict the physical relationship, while D is incorrect because the cut itself supplies usable chronological evidence.

The governing concept is architectural continuity revealed through superimposed building phases. Reusing the older wall's alignment suggests that later builders retained part of the earlier layout, perhaps while repairing, replacing, or rebuilding the structure. Option B is correct, although the alignment alone does not prove identical occupants or uninterrupted use; associated deposits and construction joints should also be examined. Abandonment, natural deposition, and secondary burial do not explain a deliberately aligned new wall.

The governing concept is the archaeological cutting relationship: a feature that cuts through another deposit or structure must have been created later than what it cuts. Because the burial pit truncates the earlier wall, the grave is later. Option A reverses the sequence, B ignores the physical evidence, and D is incorrect because the relative order is clear from the excavation record.

The governing concept is archaeological association, especially primary association. An object found in the hand of an articulated skeleton has a direct spatial and anatomical relationship with the buried individual, so the connection is strong. Option A understates the evidence, B ignores the precise position, and D denies a relationship that the undisturbed burial context supports.

The governing principle is systematic archaeological recording before interpretation. In a mixed burial, each bone must be plotted, labelled, and identified anatomically so researchers can separate the individuals and assess disturbance. Option A risks combining two people, while C and D destroy evidence. Therefore, separate recording of position and anatomical identity is the scientifically sound first step.

The governing concept is archaeological context: laboratory identification becomes historically meaningful only when the find location and associated deposit are known. A context number links bones to activities such as food consumption, craft working, or burial. It does not automatically identify species, reveal colour, or fix a date, so option A is the only complete answer.

The governing concept is recovery bias in archaeological sampling. Flotation separates light organic material and helps recover tiny remains that ordinary screening or hand excavation may miss. Their absence from ordinary excavation does not prove ritual use or modern contamination. Thus option B correctly identifies a methodological limitation, while D misunderstands why flotation is used.

Radiocarbon dating estimates the age of the sampled organic material, but archaeological interpretation also depends on secure context. If several layers meet in an open area, the sample may not be securely linked to one event or phase. Therefore A is correct. The date is not automatically wrong, the sample can still be organic, and calibration remains necessary.

The governing principle is critical evaluation of archaeological samples and depositional history. Two seeds from one hearth may belong to different species, have different life spans, come from disturbed deposits, or have been redeposited later. Therefore their species, exact context, preservation, and depositional process should be checked first. The other options do not explain a dating discrepancy.

The governing concept is the old-wood or old-material effect. A later activity may use timber or another organic object that had already grown or existed long before its deposition, producing an older radiocarbon result than the layer itself. Option A explains the conflict. The other choices either reverse the evidence, reject stratigraphy without reason, or do not generally create this pattern.

Typology provides a relative date from artefact form and sequence, while radiocarbon estimates the age of suitable organic material. A disagreement may result from residual material, contamination, insecure context, or a broad typological range. The sound method is therefore to re-examine both contexts, samples, and chronological limits. Neither method should be accepted or rejected automatically.

The governing concept is the limited precision of typological dating. If a pottery style was used for a long period, its presence can place a building within an approximate phase but cannot identify one exact year. Therefore a broad chronological range is appropriate. Option A claims unjustified precision, C discards useful evidence, and D has no logical connection with long-term use.

The governing concept is archaeological context: soil inside a vessel may preserve residues, seeds, ash, or other traces connected with what the vessel held. Soil from outside belongs to the surrounding deposit and may contain unrelated material. Mixing the two destroys the spatial distinction, so conclusions about vessel use and stored contents become unreliable. Wall height, site orientation, and grid size are not identified through this internal residue context, making option A correct.

The governing concept is residue analysis and the need to test archaeological claims rather than rely on appearance. Greasy marks may result from several foods, oils, animal products, later contamination, or preservation changes, and these possibilities can look alike. Chemical or microscopic tests provide stronger evidence about composition and possible use. Therefore option A is correct. Option B is false because ancient residues can survive, while C and D wrongly treat preservation or vessel colour as decisive.

The governing conservation principle is controlled, minimal intervention. Soluble salts can move through pores, crystallise, and detach the painted surface, but aggressive brushing, prolonged soaking, or rapid drying may cause additional loss. A conservator should first examine the object, document its condition, test a safe treatment, and use a specialist desalination method when appropriate. Option B is correct; the other choices apply uncontrolled actions that may damage the pottery or paint.

The governing concept is structural weakness in waterlogged organic material. Water may fill spaces in degraded wood and temporarily support its shape; once lifted, the object can no longer rely on the surrounding sediment or water. Its weakened fibres may bend, collapse, split, or break under its own weight. Therefore option A is correct, and lifting should use suitable support with controlled conservation. The object cannot turn into metal or soil, and careful handling does not itself change its date.

The governing concept is preventive conservation: active corrosion is accelerated by moisture, salts, oxygen, and unsuitable storage conditions. Blisters indicate that corrosion is affecting the surface and may continue beneath it, so the object should be isolated, handled carefully, documented, and placed in a stable low-humidity environment while a conservator assesses treatment. Option B is correct. Ordinary air may worsen corrosion, water can introduce moisture, and paint would conceal rather than solve the problem.

The governing concept is in situ preservation and minimal intervention. Plaster can reveal construction layers, decoration, repairs, room function, and its relationship with the wall, floor, openings, or other surfaces. Removing it may destroy this spatial evidence even if laboratory analysis produces useful material information. Therefore option A is correct: sampling should be justified, limited, documented, and undertaken only when its value outweighs the loss of context. The other options make absolute claims that are false.