Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. [4] [5] [6] Volcanic outgassing probably created the primordial atmosphere and then the ocean, but the early atmosphere contained almost no oxygen. See more The history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to understanding of the main events of Earth's … See more The history of the Earth can be organized chronologically according to the geologic time scale, which is split into intervals based on See more The first eon in Earth's history, the Hadean, begins with the Earth's formation and is followed by the Archean eon at 3.8 Ga. The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, soon after the formation … See more The Phanerozoic is the current eon on Earth, which started approximately 538.8 million years ago. It consists of three eras: The Paleozoic, Mesozoic, and Cenozoic, and is the time … See more In geochronology, time is generally measured in mya (million years ago), each unit representing the period of approximately … See more The standard model for the formation of the Solar System (including the Earth) is the solar nebula hypothesis. In this model, the Solar System formed from a large, rotating cloud of interstellar dust and gas called the solar nebula. It was composed of hydrogen and See more The Proterozoic eon lasted from 2.5 Ga to 538.8 Ma (million years) ago. In this time span, cratons grew into continents with modern sizes. The change to an oxygen-rich atmosphere was a crucial development. Life developed from prokaryotes into See more Web3.4 Inflationary epoch and the rapid expansion of space. 3.5 Supersymmetry ... years (8.8 Gya), and the Solar System formed at about 9.2 billion years (4.6 Gya), with the earliest traces of life on Earth …

Paleogene Period Natural History Museum

WebCenozoic signposts are colored yellow. The images show the art on the Trek Through Time signposts. The name of each epoch is a link to the entire plaque installed on the Trek Through Time. Paleogene Period: 66-23 million years ago Paleocene Epoch: 66-56 million years ago. What did Earth look like during the Paleocene Epoch? WebSep 30, 2014 · Understanding how humans are affecting Earth’s system requires a better grasp on the natural cycles and events that have shaped our planet through deep time. Slide through the timeline above to ... flyer shop calgary

The Glaciation Timeline - WorldAtlas

WebJul 20, 1998 · geologic time, the extensive interval of time occupied by the geologic history of Earth. Formal geologic time begins at the start of the … WebApr 25, 2024 · Epochs In World History Since The Extinction Of The Dinosaurs 1. Anthropocene (Present). Many geologists and environmentalists across the world continue to debate the separation … green island police station