Top: Comparison of the stratigraphy of the Fundy and Argana basins. Both basins contain mostly red fine-grained rocks (unpatterned red), red sandstones (circles), red cross-bedded eolian sandstones (curved lines), and basalt (orange with vertical lines). The Blomidon and Bigoudine formations are notably similar. Modified from Olsen et al. (2000)Bottom: Detailed comparison of the latest Triassic and earliest Jurassic stratigraphy of the Argana and Fundy basins. There is an almost exact match in lithology, thickness, and age in basins that are now separated by the Atlantic Ocean. Letters with numbers refer to samples used to locate the Triassic-Jurassic boundary using pollen and spores. From Olsen et al. (2000).