Explore the Venango Oil District as mapped by a diligent field survey
This nonfiction study presents the 1874–1875 progress of fieldwork in Venango County, Pennsylvania, focusing on oil-bearing sands and the early steps of surveying the region. It explains how investigators established a tide-based datum from Ennis Hill and used it to relate elevations to the surrounding rail lines, laying a foundation for future, more precise mapping.
Two short paragraphs frame the value:
- The report candidly notes the work was started in July and continued through December, with limited time for office analysis due to favorable field conditions and a small team. It explains the challenges of contouring and map-making when instruments and records are still being finalized.
- It also describes the outlook: a general understanding of oil-bearing strata is forming, but detailed conclusions will come after more extensive surveying across a larger area.
What you’ll experience:
- A clear description of the field methods used to establish elevations and base lines.
- An outline of how contour maps and wells’ locations are being assembled, with attention to oil-producing centers.
- Context on the ongoing questions about the origin and movement of oil, and why sand-rocks are central to the study.
- Notes on the practical limits of early work and the plan to supplement findings with future field and office analysis.
Ideal for readers of western Pennsylvania geology and historical oil-field surveys, this edition shows how early geologists approached large, evolving questions with pragmatic methods and evolving data.