Shloka V. Janapaty sj9547 [at] princeton [dot] edu

Which geological periods does the world's oil come from?

An interactive map of global oil fields by geological period.

Province outlines from the USGS World Petroleum Assessment. Field data scraped from Wikipedia. Source-rock ages from Klemme & Ulmishek (1991). Plate tectonics from Merdith et al. (2021). Attribution of interval fractions by Claude.