Department of Geological Sciences; College of Arts and Science (@usaskartsci); University of Saskatchewan (@usask).
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ALT Multi-panel image from paper. Caption: Ehmaniellids from mudstone of the Earlie Formation, southwestern Saskatchewan, upper Altiocculus subzone, Ehmaniella Zone. (1–3) Ehmania weedi (dorsal, anterior oblique, posterior oblique), well 04-27-003-26W3, 2387.10 m depth, RSKM-PAL-P3424. (4–9) Parehmania princeps; (4, 5) cranidium (dorsal, oblique), well 04-27-003-26W3, 2386.75 m depth, RSKM-PAL-P3425; (6) cranidium (dorsal), well 02-27-005-27W3, 2447.73 m depth, RSKM-PAL-P3423; (7) cranidium (dorsal), well 02–27-005-27W3, 2447.99 m depth, RSKM-PAL-P3422; (8) free cheek (dorsal), well 02–27-005–27W3, 2448.59 m depth, RSKM-PAL-P3421; (9) partially articulated exoskeleton (dorsal), well 02-27-005-27W3, 2447.73 m depth, RSKM-PAL-P3423. Scale bars = 2 mm.
ALT Text in front of a green background. University of Saskatchewan logo in top left corner, “Be What The World Needs” logo in the bottom right corner. “Hunting Dinosaurs in the Gobi Desert of China and Mongolia, Dr. Philip Currie, University of Alberta, Wednesday March 29, 1:00 PM, Location: Geol 255, William Sarjeant Talk Series and Paleobiology Seminar Series” on left side. Pictures of Philip Currie and a dinosaur fossil on the right side.
ALT Text in front of a green background. University of Saskatchewan logo in top left corner, “Be What The World Needs” logo in the bottom right corner. “Hunting Dinosaurs in the Gobi Desert of China and Mongolia, Dr. Philip Currie, University of Alberta, Wednesday March 29, 1:00 PM, Location: Geol 255, William Sarjeant Talk Series and Paleobiology Seminar Series” on left side. Pictures of Philip Currie and a dinosaur fossil on the right side.
ALT Figure from paper. Caption: Variations in Treptichnus pedum preservation in relation to different types of outcrop exposure. Scale bars are 1 cm. (a) Bed base with segments extending laterally on a flat, well exposed surface. Positive hyporelief, Grand Bank Head, M2A. (b) Oblique weathering of a bed top displaying sickle-like segments extending laterally and obliquely (white arrows). Note that thin mudstone laminae are progressively weathered on the surface (yellow arrows), revealing the Treptichnus morphology. Full relief, Lewin’s Cove, M2A. (c) Vertical exposure (i.e., cross-sectional view) displaying four aligned individual segments cut transversally. This type of preservation is rarely encountered in the CIF. Full relief, Point May, M2B. (d) Line drawing of (c) showing that only the lateral part of Treptichnus segments is visible on the rock surface.
ALT Multi-panel figure from paper. Caption: Comparison of M1–M2 contact at the four localities and exposure peculiarities. Scale bars are 1 cm (f), 1 m (e), 2 m (a, b), and person for scale (c, d). (a) Continuous exposure at Fortune Head from M1 through M2 (contact in dashed line). Note excellent vertical exposure. (b) Faulting and folding (right side) from M1 to M2 hampering data collection at Grand Bank Head. Note the steep cliff; this part of the outcrop is only accessible by boat. (c) Faulting of the M1–M2 contact at Point May. (d) Typical exposure at Lewin’s Cove, with common intervals covered with pebbles, cobbles, algae, and vegetation affecting M1 (?) to M2 continuity. (e) Top bedding view at Point May (M2), with cleavage affecting trace-fossil visibility. (f) Typical oblique weathering through a bedding top at Lewin’s Cove (M2). Note that weathering promoted the delicate removal of thin mudstone and sandstone laminae (arrows).
