How many dinosaur groups went extinct during the Maastrichtian stage?
21 dinosaur families
This pattern is reversed, however, in the Dinosauria with an impressive 21 dinosaur families lost over the course of the Maastrichtian.
What dinosaurs lived on laramidia?
Laramidia stretched from modern-day Alaska to Mexico. The area is rich in dinosaur fossils. Tyrannosaurs, dromaeosaurids, troodontids, hadrosaurs, ceratopsians (including Kosmoceratops and Utahceratops), pachycephalosaurs, and titanosaur sauropods are some of the dinosaur groups that lived on this landmass.
What happened in the Maastrichtian age?
Maastrichtian Stage, also spelled Maestrichtian Stage, uppermost of six main divisions in the Upper Cretaceous Series, representing rocks deposited worldwide during the Maastrichtian Age, which occurred 72.1 million to 66 million years ago during the Cretaceous Period. The Cretaceous Period and its subdivisions.
How many Parasaurolophus have been found?
three
These dinos roamed the earth during the late Cretaceous period, about 76-73 million years ago. There are actually three distinct species of Parasaurolophus, varying slightly in crest size, but mostly had similar characteristics….Dino Fact File.
| Name | Parasaurolophus |
|---|---|
| Time Period | Late Cretaceous Period |
Did T rex live in the Cretaceous period?
T. rex lived about 66–68 million years ago during the Cretaceous Period in the western United States, including Montana and Wyoming.
What kind of dinosaurs are found in Maastrichtian rocks?
It is of Maastrichtian age ( Upper Cretaceous ), and is notable for its dinosaur fossils. Many dubious names have been created for isolated bones, but several genera of dinosaurs from these rocks are well-supported, including the titanosaur sauropod Isisaurus, the abelisaurs Indosaurus, Indosuchus, Laevisuchus,…
What kind of animals lived in the Maastrichtian era?
It is most likely Maastrichtian in age, and records a seasonal, semiarid environment with rivers that had greatly varying discharges. Notable animal fossils recovered include the theropod dinosaur Majungasaurus and the early birds Rahonavis and Vorona, and the titanosaurian sauropod Rapetosaurus .
Where did the Maastrichtian stage get its name?
The Cretaceous Period and its subdivisions. The stage’s name is derived from the city of Maastricht in the southeastern Netherlands, whose surrounding area serves as the classic type district for rocks of this age.
When was the Maastrichtian stage of the Cretaceous period?
Maastrichtian Stage, also spelled Maestrichtian Stage, uppermost of six main divisions in the Upper Cretaceous Series, representing rocks deposited worldwide during the Maastrichtian Age, which occurred 72.1 million to 66 million years ago during the Cretaceous Period. Rocks of the Maastrichtian Stage overlie those…