The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 161.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata .
3-444: The Tacuarembó Formation is a Late Jurassic ( Kimmeridgian ) geologic formation of the eponymous department in northern Uruguay . The fluvial to lacustrine sandstones , siltstones and mudstones preserve ichnofossils , turtles , crocodylomorphs , fish and invertebrates ( bivalves and gastropods ). The following fossils have been reported from the formation: Late Jurassic In European lithostratigraphy ,
6-553: The name " Malm " indicates rocks of Late Jurassic age. In the past, Malm was also used to indicate the unit of geological time, but this usage is now discouraged to make a clear distinction between lithostratigraphic and geochronologic/chronostratigraphic units. The Late Jurassic is divided into three ages, which correspond with the three (faunal) stages of Upper Jurassic rock: During the Late Jurassic Epoch, Pangaea broke up into two supercontinents , Laurasia to
9-534: The north, and Gondwana to the south. The result of this break-up was the spawning of the Atlantic Ocean . However, at this time, the Atlantic Ocean was relatively narrow. This epoch is well known for many famous types of dinosaurs , such as the sauropods , the theropods , the thyreophorans , and the ornithopods . Other animals, such as some crocodylomorphs and the first birds , appeared in
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