Palynology in archaeology: what pollen reveals about past people

Pollen from pits, floors, burials, caves and nearby lakes can show how people farmed, cleared land and used plants. It can also mislead. Here is what it can and cannot tell you.

Blog · 11 min read · Published 28 September 2026 · Sources checked 28 September 2026

In archaeology, palynology is the study of pollen and spores preserved in and around archaeological sites to reconstruct the plants people lived among, grew, ate and moved. Samples taken from the site itself (floors, pits, ditches, graves, coprolites) speak about local activity. Cores from nearby lakes and bogs record the wider landscape, including forest clearance and the arrival of farming.

Its strength is that pollen is produced in huge numbers and has a tough outer wall that can survive thousands of years. Its weakness is that it does not survive everywhere, it travels, and it can enter a deposit long after the people you are studying have gone.

The most famous example of both sides is the Shanidar IV “flower burial”, which we tell below using the original papers and the later re-examinations.

What archaeopalynology studies

Archaeopalynology (or archaeological palynology) is one of the branches of palynology. It applies the same laboratory methods as other pollen work, but its questions are about people: what they planted, what they cleared, what they ate, and how they used space.

Specialists usually separate two scales of evidence.

On-site vs off-site pollen analysis

The strongest studies combine both. A lake core can show cereal pollen and falling tree pollen at a given date; the site samples tell you whether the people in that settlement were the ones doing the farming.

Where archaeologists find pollen

Pollen survives best where oxygen and microbes are kept out: waterlogged, acidic or rapidly sealed deposits. The usual sampling targets are:

• Waterlogged features. Wells, ditches and pits that cut below the water table often hold well-preserved pollen and other plant remains.
• Buried soils and old land surfaces sealed under banks, mounds or barrows.
• Lake and bog sediments near the site, sampled as cores (the off-site record described in our guide to reading pollen from lake cores).
• Cave sediments, which can preserve long records but have their own transport routes (see Shanidar below).
• Coprolites and gut contents. Preserved faeces and, in rare cases, the intestines of mummified bodies contain pollen from food, drink and air swallowed shortly before death or deposition.
• Burials. A grave holds several micro-environments with different preservation potential, so sampling needs a plan for each (Reinhard and Bryant describe dietary sampling methods for burials).

Before any of this reaches a microscope, the sediment has to be concentrated in the lab. We explain those steps in preparing pollen samples.

What pollen can reveal

The start of farming and forest clearance

In off-site cores, the arrival of agriculture usually shows up as a combination of signals rather than one grain type: a fall in tree pollen, a rise in grasses and open-ground herbs, cereal-type pollen, and weeds of cultivation and grazing. Karl-Ernst Behre’s work on “anthropogenic indicators” (collected in Anthropogenic Indicators in Pollen Diagrams, 1986) is the standard reference for which plants follow human activity.

Two cautions apply. “Cereal-type” pollen overlaps in size and structure with some wild grasses, which is why papers such as Köhler and Lange (1979) were devoted to telling them apart. And a single cereal grain is weak evidence; analysts look for a consistent pattern across several levels. If you are new to these diagrams, start with how to read a pollen diagram.

Diet

Coprolites preserve pollen from what people ate and drank. A study at Texas A&M analysed 26 prehistoric human coprolites from Antelope House in Arizona (Williams-Dean and Bryant, 1975). Concentration matters as much as percentages: Sobolik (1988) found that coprolites with very high pollen concentrations tend to be dominated by a few economic plants eaten shortly before, which helps separate food from background pollen that was simply swallowed with air and water.

Movement and season

The most detailed example is Ötzi, the 5,200-year-old Iceman found in the Eastern Alps. By sampling his digestive tract sequentially, Oeggl and colleagues (2007) reconstructed the environments of his last meals. In his last 33 or so hours, he moved from near the timberline (about 2,500 m) down into the zone of warmth-loving trees (about 1,200 m or lower) and finally up above 3,000 m, where he died.

Ritual and use of space

Pollen concentrations in floors, graves or containers are sometimes used to argue for deliberate placement of plants. These are the claims that need the most scrutiny, as the next sections show.

Which contexts are worth sampling

This is the table we wish every excavation plan started with. It summarises preservation and interpretive risk by context. It is a rule-of-thumb guide based on the sources in this article, not a substitute for a specialist’s assessment of your particular site.

Sources for the rows on base-rich soils, caves, coprolites and gut contents are given in the case sections below.

Famous cases and what we learned

Shanidar IV: the “flower burial”

What was claimed. Shanidar Cave in Iraqi Kurdistan was excavated by Ralph Solecki’s team in the 1950s and in 1960. Around the Neanderthal skeleton known as Shanidar IV, soil samples analysed by Arlette Leroi-Gourhan were unusually rich in pollen. Some grains were in clusters, a few still in the shape of an anther, and several of the plants have known medicinal uses. In 1975 both researchers published in Science, and the idea that Neanderthals had buried a man with flowers became one of the best-known stories in prehistory.

How it was challenged. In 1999 Jeffrey Sommer argued that a burrowing rodent native to the region, the Persian jird (Meriones persicus), could have carried enough flower heads into the cave to explain the pollen. Other critics also questioned the interpretation.

What the pollen taphonomy showed. Fiacconi and Hunt (2015) sampled modern surface sediments across the cave and outside it. Wind-pollinated types were similar inside and out, but insect-pollinated types were higher inside, which they attribute mainly to bees. Almost all the plant families from the Shanidar IV samples also turned up in the modern surface samples, and much of the daisy-family (Asteraceae) pollen occurred in groups of 2 to 5 grains, “suggesting that the grouping of grains noted by Leroi-Gourhan (1975) can occur naturally.”

Where it stands. New Neanderthal remains found next to Shanidar IV were published in 2020 (Pomeroy et al.), and the authors reported that analyses of the plant material, including any pollen, were underway. The honest answer today is that the pollen alone does not prove a flower burial, and the question is being re-examined with modern methods.

Ötzi: a route read from the gut

The Iceman study (Oeggl et al., 2007) is the opposite of Shanidar: a sealed, frozen body, a clear sampling sequence and a question pollen is well suited to answer. It shows what archaeological palynology can do when context is secure.

Windmill Hill: when pollen and snails disagree

On Neolithic land surfaces on the chalk of southern England, Dimbleby and Evans (1974) found that pollen and land snails often gave different pictures. At Windmill Hill the molluscs suggested woodland while the pollen indicated farmland. Their explanation: in base-rich soils pollen is ephemeral, so the surviving grains may record only the latest phase, while shells persist longer. The lesson is to match the method to the soil.

Pitfalls: contamination, bioturbation and differential preservation

Contamination

Modern pollen settles on open sections, tools and sample bags. Good practice is to clean the face before sampling, use clean tools for each sample, seal samples immediately and take control samples (for example from layers above and below, and modern surface samples) so that unusual results can be tested.

Bioturbation and intrusion

Roots, earthworms and burrowing animals move pollen between layers. Hunt and Fiacconi (2018) note that ground-living animals such as foxes, badgers, porcupines and rodents may be significant importers of pollen into caves. A burrow through a grave can make modern pollen look ancient.

Differential preservation

Pollen walls resist decay, but not equally. Oxidation, alkaline conditions and microbial attack destroy some types faster than others, which can skew percentages towards the toughest grains. Hunt and Fiacconi point out that cave sediments are rarely waterlogged and pollen in them can suffer microbial and chemical degradation. Charcoal-rich archaeological samples raise a practical problem too: so much charcoal that grains are hard to count (Bryant and Holloway, 2009, published methods to reduce it).

Differential production and transport

Wind-pollinated plants release far more pollen than insect-pollinated ones, so percentages are not proportions of plants. Animals add their own bias: in Shanidar, bees appear to concentrate insect-pollinated types inside the cave.

Palynology vs archaeobotany vs phytoliths

“Archaeobotany” is often used broadly for all plant remains from archaeological sites, pollen included. In practice, three lines of evidence are compared:

The methods are complementary. Where pollen is poorly preserved, as in the base-rich soils of the Windmill Hill example, other proxies can fill the gap.

Can pollen date a site?

Pollen is not a dating method in itself. A pollen sequence can be matched to a well-dated regional sequence to give a rough relative age, and pollen extracted from sediment can be radiocarbon dated by accelerator mass spectrometry (Brown et al., 1989). For an archaeological layer, however, radiocarbon on short-lived plant remains or other direct methods are usually preferred.

How to work in archaeological palynology

Most people in this field come from archaeology, botany or Quaternary science and specialise during a master’s or PhD. Useful skills are pollen identification, sediment and soil science, statistics and a solid grasp of excavation practice. Commercial archaeology units and university labs both employ palynologists, although posts are few.

One of the leading figures in the field, Vaughn M. Bryant of Texas A&M, is profiled among our pioneers and experts. If you are choosing a programme, see where to study archaeological palynology.

If you are an archaeologist who needs samples analysed rather than a career, our guide on how to commission a pollen analysis covers what to ask a lab and how to take and ship samples. For project planning, Historic England’s environmental archaeology guidance (third edition, 2025) covers sampling, recovery and processing.

Frequently asked questions

Can pollen date an archaeological site?

Not directly. A pollen sequence can be compared with dated regional sequences for a rough relative age, and pollen concentrates can be radiocarbon dated by accelerator mass spectrometry. Archaeologists usually prefer radiocarbon dates on short-lived plant remains or other direct methods for a specific layer.

Why is pollen poorly preserved in some soils?

Oxygen, microbes and alkaline chemistry break pollen walls down. In base-rich soils such as those on chalk, pollen can be so short-lived that the grains that survive reflect only the latest phase, which is why Dimbleby and Evans compared pollen with land snails on such sites.

What is the difference between archaeobotany and palynology?

Archaeobotany studies plant remains from archaeological sites, usually seeds, charred grain, wood charcoal and phytoliths, and in a broad sense pollen too. Palynology studies pollen and spores specifically. Pollen shows local and regional vegetation; macrofossils show plants people actually handled.

Did Neanderthals bury their dead with flowers at Shanidar?

It has not been proven. The 1975 pollen clusters were challenged by a rodent-burrowing explanation in 1999, and a 2015 study found that similar pollen clusters form naturally in the cave, mostly via bees. New remains found in 2020 are being studied with modern methods.

What is on-site and off-site pollen analysis?

On-site analysis samples the archaeological deposits themselves, such as pits, floors and graves, to study local activities. Off-site analysis samples nearby lakes or bogs to reconstruct the wider landscape, such as forest clearance and the spread of farming.

Sources

• Solecki R.S. (1975). Shanidar IV, a Neanderthal flower burial in northern Iraq. Science 190: 880–881. doi:10.1126/science.190.4217.880
• Leroi-Gourhan A. (1975). The flowers found with Shanidar IV, a Neanderthal burial in Iraq. Science 190: 562–564. doi:10.1126/science.190.4214.562
• Sommer J.D. (1999). The Shanidar IV ‘flower burial’: a re-evaluation of Neanderthal burial ritual. Cambridge Archaeological Journal 9: 127–129. doi:10.1017/S0959774300015249
• Fiacconi M., Hunt C.O. (2015). Pollen taphonomy at Shanidar Cave (Kurdish Iraq): an initial evaluation. Review of Palaeobotany and Palynology 223: 87–93. doi:10.1016/j.revpalbo.2015.09.003 (open manuscript)
• Hunt C.O., Fiacconi M. (2018). Pollen taphonomy of cave sediments. Quaternary International 485: 68–75. doi:10.1016/j.quaint.2017.05.016
• Pomeroy E. et al. (2020). New Neanderthal remains associated with the ‘flower burial’ at Shanidar Cave. Antiquity 94: 11–26. doi:10.15184/aqy.2019.207
• Oeggl K. et al. (2007). The reconstruction of the last itinerary of “Ötzi”, the Neolithic Iceman, by pollen analyses from sequentially sampled gut extracts. Quaternary Science Reviews 26: 853–861. doi:10.1016/j.quascirev.2006.12.007
• Dimbleby G.W., Evans J.G. (1974). Pollen and land-snail analysis of calcareous soils. Journal of Archaeological Science 1(2): 117 ff. doi:10.1016/0305-4403(74)90038-7
• Bryant V.M., Holloway R.G. (1983). The role of palynology in archaeology. Advances in Archaeological Method and Theory 6: 191–224. doi:10.1016/B978-0-12-003106-1.50010-9
• Bryant V.M., Holloway R.G. (2009). Reducing charcoal abundance in archaeological pollen samples. Palynology 33(2): 63–72. doi:10.2113/gspalynol.33.2.63
• Williams-Dean G., Bryant V.M. (1975). Pollen analysis of human coprolites from Antelope House. Kiva 41(1): 97–111. doi:10.1080/00231940.1975.11757838
• Sobolik K.D. (1988). The importance of pollen concentration values from coprolites: an analysis of Southwest Texas samples. Palynology 12(1): 201–214. doi:10.1080/01916122.1988.9989344
• Reinhard K.J., Bryant V.M. (2008). Burials: dietary sampling methods. In Encyclopedia of Archaeology, 937–944. doi:10.1016/B978-012373962-9.00041-8
• Behre K.-E. (ed.) (1986). Anthropogenic Indicators in Pollen Diagrams. Rotterdam: Balkema. Review: Birks, Journal of Ecology 76 (1988), doi:10.2307/2260581
• Köhler E., Lange E. (1979). A contribution to distinguishing cereal from wild grass pollen grains by LM and SEM. Grana 18: 133–140. doi:10.1080/00173137909424973
• Brown T.A., Nelson D.E., Mathewes R.W., Vogel J.S., Southon J.R. (1989). Radiocarbon dating of pollen by accelerator mass spectrometry. Quaternary Research 32: 205–212. doi:10.1016/0033-5894(89)90076-8
• Historic England (2025). Environmental Archaeology: A Guide to the Theory and Practice of Methods, from Sampling and Recovery to Post-excavation, 3rd ed. historicengland.org.uk