Slide 12: Proxy data sources: Other
Glacial moraines give a rough picture of glacial advances and retreats, but successive movements which erase each other, as well as difficulties in dating moraines, limit the application.
Lacustrine (lake) size variation , especially in arid areas, can be significant, so stratigraphic and microfossil analysis can give some indication of climate variation.
Pollen accumulates on all surfaces, and is useful for palaeoclimatic deduction. However, the many difficulties associated with analysis mean that only qualititative comparisons ("warmer/dryer", rather than "an X degree temperature difference") are feasible.
Sedimentary rocks can provide data through facies analysis (rock types), assessment of fossils and microfossils, and analysis of sediment grain size/rate of deposition. However, the resolution of these data is very low (thousands of years).