Palynology and Fossil Pollen

Palynology studies pollen, spores, and other organic-walled microfossils, providing a detailed record of past vegetation, climate, and stratigraphy.

Definition

Palynology is the study of palynomorphs, microscopic organic-walled bodies such as pollen and spores, used to reconstruct past plant communities, environments, and the ages of sediments.

Scope

This topic covers palynomorphs including pollen, spores, dinoflagellate cysts, and acritarchs, their resistant organic walls, preparation and counting, and applications in pollen analysis of Quaternary vegetation, deep-time biostratigraphy, and paleoclimate reconstruction.

Core questions

• What organisms produce the main palynomorph groups?
• How is pollen analysis used to reconstruct past vegetation?
• How do palynomorphs aid biostratigraphy in non-marine settings?
• Why do organic-walled microfossils preserve so well?

Key concepts

• Palynomorphs and sporopollenin
• Pollen diagrams
• Dinoflagellate cysts and acritarchs
• Terrestrial biostratigraphy

Key theories

Pollen rain and vegetation reconstruction

The assemblage of pollen accumulating in a basin reflects the surrounding vegetation, allowing past plant communities and climate to be inferred from pollen diagrams.

Sporomorph biostratigraphy

Spores and pollen provide zonation of terrestrial and marginal-marine strata where marine microfossils are absent.

Clinical relevance

Palynology reconstructs Quaternary vegetation and climate change, supports petroleum and coal exploration through biostratigraphy, and contributes to forensic and archaeological investigations through resistant pollen evidence.

History

Quantitative pollen analysis was pioneered by Lennart von Post in the early twentieth century to reconstruct postglacial vegetation. Palynology then expanded into deep-time stratigraphy and paleoclimatology and became a standard tool in resource exploration.

Debates

Quantitative interpretation of pollen percentages

Translating pollen percentages into actual vegetation abundance is complicated by differential production, dispersal, and preservation among plant taxa.

Key figures

• Alfred Traverse
• Lennart von Post
• Margaret Collinson

Seminal works

• traverse2007
• moore1991

Frequently asked questions

What is palynology?

Palynology is the study of pollen, spores, and similar microscopic organic particles, both modern and fossil, often to reconstruct past environments.

Why does fossil pollen survive so long?

Pollen and spore walls are made of sporopollenin, an extremely resistant organic compound that resists decay over millions of years.