1. Geology as a working scaffold
In my field work I treat geology as a measuring stick. Formations, members, mapped gravels and plateau deposits provide a common language for describing where things come from. Even when I think parts of the mainstream story are too thin, the stratigraphic framework lets me record, compare and communicate without reinventing terms for every slope or horizon.
On Eoliths.org that means I use the same broad structure as current mapping: Paleogene and Neogene bedrock, Quaternary covers, local drift and head deposits. The South Downs eoliths, flint tools and figure stones are described against that backdrop. Where my interpretations depart from the standard narrative, the disagreement is made explicit rather than quietly dissolving the whole framework.
2. Old labels: Primary, Secondary, Tertiary, Quaternary
Early eolith writers – and many nineteenth-century geologists – worked with a much coarser set of labels:
| Older broad term | Rough meaning in older texts | Modern equivalent framing |
|---|---|---|
| Primary | “Oldest fossil-bearing rocks” (usage varied) | Mostly Paleozoic Era |
| Secondary | “Middle” fossil-bearing strata | Mostly Mesozoic Era |
| Tertiary | “After Secondary, before Quaternary” | Paleogene + Neogene (Cenozoic) |
| Quaternary | “Most recent time” | Quaternary Period / System |
These terms are now largely historical. Modern stratigraphy prefers a formal hierarchy of Eon → Era → Period → Epoch → Age. But because much of the classic eolith literature was written before that system settled, you will still see “Tertiary beds” and similar phrases in older sources. Where they appear on this site they are translated into modern units whenever practical.
3. Translating “Tertiary” into Paleogene and Neogene
For the purposes of eoliths and early tools, the most important translation is:
| Old label in antiquarian texts | Modern formal unit(s) | Approximate time range (Ma) |
|---|---|---|
| Lower Tertiary | Paleogene (Paleocene–Oligocene) | 66.0–23.03 |
| Upper Tertiary | Neogene (Miocene–Pliocene) | 23.03–2.58 |
| “Tertiary” (general) | Paleogene + Neogene | 66.0–2.58 |
Older eolith debates often hang on whether a gravel or plateau deposit is “Tertiary” or “Quaternary”. On this site, that same argument is restated in terms of Paleogene / Neogene vs Quaternary, but the underlying question is the same: how old is the surface the artefacts sit in, and how many episodes of reworking has it seen?
4. Epochs you will see on this site
At the finer scale, epochs are sometimes used directly in the Atlas entries. As a reminder, the key Cenozoic epochs are:
| Epoch | Period | Approximate age range (Ma) |
|---|---|---|
| Paleocene | Paleogene | 66.0–56.0 |
| Eocene | Paleogene | 56.0–33.9 |
| Oligocene | Paleogene | 33.9–23.03 |
| Miocene | Neogene | 23.03–5.333 |
| Pliocene | Neogene | 5.333–2.58 |
| Pleistocene | Quaternary | 2.58–0.0117 |
| Holocene | Quaternary | 0.0117–present |
In the Atlas JSON, age ranges are usually given as age_ma_min
and age_ma_max. Those numbers are meant as reasonable
windows, not as proof that every patinated stone can be
pinned to a single hundred-thousand-year slice.
5. Archaeology labels vs geology time
The classic Palaeolithic labels are defined by tool traditions, not by rock boundaries:
- Lower Palaeolithic – earliest stone tool traditions, long chronological span.
- Middle Palaeolithic – prepared-core and flake-dominated traditions.
- Upper Palaeolithic – blade-rich assemblages and complex cultural horizons.
These can overlap multiple climates and formations. A “Lower Palaeolithic” assemblage in one region may sit in very different deposits than an equally old assemblage somewhere else. That is why this site treats archaeology labels as cultural shorthand, while relying on the geological timescale for the physical context of each site or surface.
For the South Downs work, my own material appears to be broadly Lower Palaeolithic in character but associated with heavily patinated pieces and surface contexts that are often mapped as Paleogene–Neogene drift and plateau deposits. That tension is precisely why the geology baseline matters: without a shared scaffold, the argument collapses into hand-waving about “old stones”.
6. How this baseline feeds the Atlas and theory sections
In practical terms, the geology baseline does three things for Eoliths.org:
- It lets Atlas entries declare an epoch and age range for each artefact or plate, using modern units even when the original source said “Tertiary”.
- It keeps the catastrophism argument honest: rapid events are considered on top of, not instead of, the mapped formations and their formal ages.
- It anchors more speculative topics – human evolution models, unusual faunas, dinosaur-like imagery – in a clearly stated stratigraphic backdrop.
You do not have to agree with every interpretation on this site to benefit from the baseline. The geology here is a shared coordinate system, so that when we disagree we know exactly where the disagreement sits.
7. FAQ: Geology, old terms and baselines
Do you accept all modern geological ages as fixed?
I use the modern ages as a working framework, not as a priesthood. Many boundaries are well supported by field data. Others may shift as new work is done. For my purposes, the important point is consistency: that the same scale is used across sites so that comparisons are meaningful.
Why not invent a new terminology for your own work?
Because that would make comparison harder, not easier. Whatever I think of current narratives, the existing stratigraphic system is the language most researchers recognise. Using it as a scaffold keeps the conversation grounded.
What if an artefact’s context is disturbed or mixed?
Disturbance and mixing are real, especially in drift and plateau deposits. In those cases the geology baseline still helps: it tells you what materials are present and what ages they most likely come from, even if the exact history of every clast is complex. The catastrophism page explores this in more detail.
How does this relate to your South Downs site specifically?
The South Downs assemblage sits within a landscape of chalk, flint seams and reworked plateau gravels that are generally mapped as Paleogene–Neogene, overlain by Quaternary head. Understanding that framework is essential for making sense of why so many heavily patinated tools and figure stones are found where they are.
Where should I go next on Eoliths.org?
For how rapid events fit into this baseline, see the theory page on catastrophism, floods and British rocks. For questions about fossil gaps, dinosaurs and certainty, see the theory page on dinosaurs and fossils. For the artefact catalogue itself, explore the Atlas and Gallery.