Britannica
Sources used in this answer
How do pollen fossils reveal changes in ancient climates and vegetation?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Quaternary
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the Quaternary Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
Palynology is the scientific study of pollen and spores, which are highly resistant to decay and widely dispersed by wind and water. Because these microfossils are preserved in sedimentary rocks and bogs, they provide a reliable record of past environments.12
Pollen fossils reveal ancient climate and vegetation changes through the following mechanisms:
- Vegetation Reconstruction: The presence and relative abundance of specific pollen types in a sediment layer reflect the regional forest composition at the time of deposition.1
- Climatic Indicators: Because forest makeup is driven by climate, shifts in the types of pollen found in successive layers of sediment indicate historical climatic change.12
- Geochronological Utility: By analyzing these assemblages, scientists can delineate the geographical distribution of plant groups and identify glacial and interglacial stages, particularly throughout the Pleistocene Epoch.12
These terrestrial records are essential for correlating environmental shifts across different regions and are often compared with ice cores and marine records to build a comprehensive global history of the Quaternary period.13