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What dates mark the Late Jurassic Epoch?
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Jurassic Period
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the late Jurassic Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The Late Jurassic Epoch is defined as the interval occurring from 163.5 million to 145 million years ago.1
This epoch, sometimes referred to as the Malm, is one of three major subdivisions of the Jurassic Period. It is further divided into three distinct stages:
These stages are primarily established through the study of index fossils, such as ammonites, bivalves, and protozoans.1