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The Maastrichtian (/ m ɑː ˈ s t r ɪ k t i ə n / mahss-TRIK-tee-ən) is, in the International Commission on Stratigraphy (ICS) geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from .
English: The geologic time scale proportionally represented as a log-spiral. Some key events in Earth's history are marked on the diagram, including major extinction events, global scale glaciations, the inanition of permanent atmospheric oxygen, the formation of the moon, and the formation of Earth's magnetic field.
Subdivision of the Cretaceous according to the ICS, ... Vertical axis scale: Millions of years ago. References This page was last edited on 16 ...
Over time, models were often made available in several different paint schemes. [3] Models were made in China, usually in batches of between 1,000 and 5,000 pieces. [ 4 ] The normal scale produced was 1:24, but models were also issued in 1:43, 1:18 and even a very large 1:8 for the 1885 Daimler (Single Track) Reitwagen and the 1885/1886 Benz ...
The Albian is both an age of the geologic timescale and a stage in the stratigraphic column.It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/Series.
The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 125.77 Ma (million years ago) and 121.4 ± 1.0 Ma [2] (Historically, this stage was placed at 129.4 million to approximately 125 million years ago [3]) It is a subdivision of the Early Cretaceous Epoch (or Lower Cretaceous Series).
Geochronological units are periods of time, thus it is correct to say that Tyrannosaurus rex lived during the Late Cretaceous Epoch. [16] Chronostratigraphic units are geological material, so it is also correct to say that fossils of the genus Tyrannosaurus have been found in the Upper Cretaceous Series. [ 17 ]
Palaeogeography of the Earth in Aptian. The Aptian is an age in the geologic timescale or a stage in the stratigraphic column.It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ago), approximately.