Mesozoic Era | Geology, Climate & Lifeforms | Britannica
2024年11月13日 · The major divisions of the Mesozoic Era are, from oldest to youngest, the Triassic Period, the Jurassic Period, and the Cretaceous Period. The ancestors of major plant and animal groups that exist today first appeared during the Mesozoic, but this era is best known as the time of the dinosaurs.
Fossils Through Geologic Time - U.S. National Park Service
The Mesozoic Era (252 to 66 million years ago) was the "Age of Reptiles." Dinosaurs, crocodiles, and pterosaurs ruled the land and air. As climate changed, sea levels rose world-wide and seas expanded across the center of North America.
Mesozoic Fossils - Glen Canyon National Recreation Area (U.S.
The Mesozoic is divided into three time periods: Triassic (251-200 mya), Jurassic (200-145 mya), and Cretaceous (145-65 mya). During the Mesozoic, meaning "middle life," dinosaurs evolved and became diverse and the earliest mammals appeared. The …
Mesozoic - Wikipedia
The Mesozoic was a time of significant tectonic, climatic, and evolutionary activity. The supercontinent Pangaea began to break apart into separate landmasses. The climate of the Mesozoic was varied, alternating between warming and cooling periods.
Scenes of Parks and Evolution - Fossils and Paleontology (U.S.
The fossil record contained within the National Park System as a whole tells a remarkable story of evolution and the changing life on Earth through geologic time. Fossils in national parks are as old as 1.45 billion years old and are as young as from the Holocene. ... Mesozoic Scenes. Life during the Mesozoic Era (e.g., the Age of Reptiles) is ...
Mesozoic | U.S. Geological Survey - USGS.gov
Mesozoic (252-66 million years ago) means 'middle life' and this is the time of the dinosaurs. This era includes the Triassic, Jurassic, and Cretaceous Periods, names that may be familiar to you. It ended with a massive meteorite impact that caused a mass extinction, wiping out the dinosaurs and up to 80% of life on Earth.
2.7: Phanerozoic Eon - Mesozoic Era - Geosciences LibreTexts
2024年4月11日 · Following the Permian Mass Extinction, the Mesozoic (“middle life”) was from 252 million years ago to 66 million years ago. As Pangea started to break apart, mammals, birds, and flowering plants developed. The Mesozoic is probably best known as the age of reptiles, most notably, the dinosaurs.
Mesozoic Era Paleobiology - Fossil
One of the most striking events in the Mesozoic Era was the rise to dominance of dinosaurs in terrestrial ecosystems. The Mesozoic lasted from 245 to 65 million years ago, and is divided into three periods.
An extraordinary fossil captures the struggle for existence during …
2023年7月18日 · Here we report a new fossil find from the Lujiatun Member of the Lower Cretaceous Yixian Formation of China, showing a gobiconodontid mammal and psittacosaurid dinosaur locked in mortal combat.
The spatiotemporal distribution of Mesozoic dinosaur diversity
4 天之前 · 1. Introduction. Dinosaurs first appear in the fossil record in the Middle or Late Triassic [1–4], approximately 230 million years ago (Ma).They diversified and dispersed to become a cosmopolitan radiation, dominating Mesozoic terrestrial ecosystems (e.g. [5,6]; figure 1a–c).Dinosaurs also survived two mass extinction events [1,2,7] and today represent one of the most speciose clades of ...