Tithonian
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In the geological timescale, the Tithonian is the latest age of the Late Jurassic Epoch and the uppermost stage of the Upper Jurassic Series. It spans the time between 149.2 ±0.7 Ma and 143.1 ±0.6. It
Artistic representation of a brachiosaurid, with the Morokweng impactor in the background, moments before impact
The Jurassic-Cretaceous transition saw the extinction of thalassochelydian turtles, such as Plesiochelys
Some studies have argued that sauropods, like Apatosaurus louisae, were strongly impacted by the Tithonian extinction
Emperor Seamounts
Rhaetian
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The Rhaetian is the latest age of the Triassic Period or the uppermost stage of the Triassic System. It was preceded by the Norian and succeeded by the Hettangian. The base of the Rhaetian lacks a for
Tithonian
…195 — – −190 — – −185 — – −180 — – −175 — – −170 — – −165 — – −160 — – −155 — – −150 — – −145 — – −140 — Mesozoic T Jurassic K LT Early Middle Late EK Rhaetian Hettangian Sinemurian Pliensbachian Toarcian Aalenian Bajocian Bathonian Callovian Oxfordian Kimmeridgian Tithonian Berriasian ← Triassic–Jurassic…
Hüsing et al. (2011) argued that the Rhaetian extended for almost 10 million years based on biomagnetostratigraphy at Steinbergkogel, a candidate GSSP near Hallstatt, Austria.
Wotzlaw et al. (2014) radiometrically dated the Norian–Rhaetian boundary to ~205.50 Ma based on the extinction of Monotis in Peru.