The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy and geochronology. It is used primarily by Earth scientists to describe the timing and relationships of events in geologic history. The time scale has been developed through the study of rock layers and the observation of their relationships and identifying features such as lithologies, paleomagnetic properties, and fossils. The definition of standardised international units of geologic time is the responsibility of the International Commission on Stratigraphy (ICS), a constituent body of the International Union of Geological Sciences (IUGS), whose primary objective is to precisely define global chronostratigraphic units of the International Chronostratigraphic Chart (ICC) that are used to define divisions of geologic time. The chronostratigraphic divisions are in turn used to define geochronologic units.
The Quaternary is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS), as well as the current and most recent of the twelve periods of the Phanerozoic eon. It follows the Neogene Period and spans from 2.58 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene and the Holocene ; a proposed third epoch, the Anthropocene, was rejected in 2024 by IUGS, the governing body of the ICS.
The International Commission on Stratigraphy (ICS), sometimes unofficially referred to as the "International Stratigraphic Commission", is a daughter or major subcommittee grade scientific daughter organization that concerns itself with stratigraphical, geological, and geochronological matters on a global scale.
In the stratigraphy sub-discipline of geology, a Global Standard Stratigraphic Age, abbreviated GSSA, is a chronological reference point and criterion in the geologic record used to define the boundaries between different geological periods, epochs or ages on the overall geologic time scale in a chronostratigraphically useful rock layer. A worldwide multidisciplinary effort has been ongoing since 1974 to define such important metrics. The points and strata need be widespread and contain an identifiable sequence of layers or other unambiguous marker attributes.
Siccar Point is a rocky promontory in the county of Berwickshire on the east coast of Scotland. It is famous in the history of geology for Hutton's Unconformity found in 1788, which James Hutton regarded as conclusive proof of his uniformitarian theory of geological development.
The United Nations General Assembly declared 2008 as the International Year of Planet Earth to increase awareness of the importance of Earth sciences for the advancement of sustainable development. UNESCO was designated as the lead agency. The Year's activities spanned the three years 2006–2009.
The year 2006 was declared the International Year of Deserts and Desertification by the United Nations General Assembly. The Year aims to raise $20 million from industry and governments and will spend half on co-funding research, and half on "outreach" activities. It will be the biggest ever international effort to promote the Earth sciences. Apart from researchers, who are expected to benefit under the Year's Science Programme, the principal target groups for the Year's broader messages are:
The Rio Minho is the longest river in Jamaica at 92.8 kilometres (57.7 mi). It rises close to the island's geographic centre, flows generally south-southwest and reaches the Caribbean Sea at Carlisle Bay in the central south coast, to the west of the island's southernmost point, Portland Point.
A geologist is a scientist who studies the structure, composition, and history of Earth. Geologists incorporate techniques from physics, chemistry, biology, mathematics, and geography to perform research in the field and the laboratory. Geologists work in the energy and mining sectors to exploit natural resources. They monitor environmental hazards such as earthquakes, volcanoes, tsunamis and landslides. Geologists are also important contributors to climate change discussions.
The International Association for Engineering Geology and the Environment (IAEG), formerly International Association for Engineering Geology, is an international scientific society that was founded in 1964. It is affiliated with the International Union of Geological Sciences (IUGS) and has 3,798 members spread across 59 national groups around the world.
Mistaken Point Ecological Reserve is a wilderness area and a UNESCO World Heritage Site located at the southeastern tip of Newfoundland's Avalon Peninsula in the Canadian province of Newfoundland and Labrador. The reserve is home to the namesake Mistaken Point Formation, which contains one of the most diverse and well-preserved collections of Precambrian fossils in the world. Ediacaran fossils discovered at the site constitute the oldest known remnants of multicellular life on Earth.
The International Commission on the History of Geological Sciences (INHIGEO) promotes ongoing research into the history of the earth sciences, particularly the history of geology. It has 20 Honorary Senior Members and 301 members (2018) worldwide.
The Guinea Corn Formation is a geologic formation in Jamaica. It preserves fossils dating back to the Cretaceous period.
Geoethics is the branch of ethics which relates to the interaction of human activity with our physical world in general, and with the practice of the Earth sciences in particular. It may also have relevance to planetary sciences. It is described as an emerging scientific and philosophical discipline, consisted of research and reflection on the values that serve as the bases of behaviors and practices wherever human activities interact with the Earth system. Moreover, geoethics promotes the ethical and social roles of geoscientists in conducting scientific and technological research and practice.
The Meghalayan age is the name given in 2018, by the International Commission on Stratigraphy, to the current age or latest geologic age – or uppermost stage of the Quaternary. It is also the upper, or latest, of three subdivisions of the Holocene epoch or series. This way of breaking down time is based only on geology; for example, it is unrelated to the three-age system of historical periods into which human development is sometimes divided.
The Commission for the Geological Map of the World is an international association in the field of geology. Its main role is the production of small-scale geological or geoscience-related maps of the globe, or parts of the globe. It is an organization affiliated to the IUGS International Union of Geological Sciences (IUGS) and International Union of Geodesy and Geophysics (IUGG) and is a UNESCO-related scientific NGO.
Also known as Earth science education, It is the study of Earth's physical features, processes, and systems, as well as the natural and human-induced events that shape it. It encompasses a wide range of disciplines, including geology, oceanography, meteorology, climatology, environmental science, and more. Geoscience education plays a crucial role in fostering scientific literacy, environmental awareness, and sustainable development, as well as in preparing future generations of geoscientists, policymakers, educators, and citizens. It is also a branch of science education.
Barry J. Cooper (1948–2023) was an Australian geologist, professor at the University of South Australia, historian of geology and public figure. President of the International Commission on the History of Geological Sciences (2016-2020).
Vladimir V. Tikhomirov History of Geology Award is a geological and historical medal of the International Union of Geological Sciences (IUGS). It is the only international award for scientific contributions and achievements in the field of history of geological sciences.
