G D O A S A R O L E G I [TGS7112] 2 SKS teori 1 SKS praktikum Semester 1, 2017-2018 O A S A R G O L D E G I 2 SKS teori 1 SKS praktikum [TGS7112] Dr. Hill. Gendoet Hartono

Atom, Unsur, Mineral Magmatisme, Batuan Beku, Intrusi Volkanisme, Batuan Piroklastika, Ekstrusi Metamorfisme, Batuan Metamorf/Malihan Sedimentasi, Sedimen, Batuan Sedimen Pelapukan, Tanah Waktu, prinsip geologi Sedimentologi & Stratigrafi Hidrologi & Air Tanah Energi Panas Bumi Gerakan Tanah & Banjir Geologi Struktur Interior Planet Bumi Tektonik Lempeng

Geologic time scale

The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time, and is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.  Skala waktu geologi digunakan oleh para ahli geologi dan ilmuwan untuk menjelaskan waktu dan hubungan antar peristiwa yang terjadi sepanjang sejarah Bumi.

This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga (billion years ago).[1] Other subdivisions reflect the evolution of life; the Archean and Proterozoicare both eons, the Palaeozoic, Mesozoic and Cenozoic are eras of the Phanerozoic eon. The three million year Quaternary period, the time of recognizable humans, is too small to be visible at this scale.

Eon Era Period Epoch Age Phanerozoic Cenozoic Paleogene Oligocene Chattian Rupelian The Phanerozoic is subdivided into three major divisions: the Cenozoic, Mesozoic, and Paleozoic Eras. The "-zoic" suffix comes from the root "zoo," which means animal. This is the same root as in the words zoology and zoological park (or zoo). "Cen-" means recent, "Meso-" means middle, and "Paleo-" means ancient. These divisions reflect major changes in the composition of ancient faunas, each era being recognized by its domination by a particular group of animals. The Cenozoic has sometimes been called the "Age of Mammals," the Mesozoic the "Age of Dinosaurs," and the Paleozoic the "Age of Fishes." But this is an overly simplified view, which has some value for the newcomer but can be a bit misleading. For instance, other groups of animals lived during the Mesozoic. In addition to the dinosaurs, animals such as mammals, turtles, crocodiles, frogs, and countless varieties of insects also lived on land. Additionally, there were many kinds of plants living in the past that no longer live today. Ancient floras went through great changes too, and not always at the same times that the animal groups changed.

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