Advanced Search Department of Geology and Geophysics Geochronlogy Faculty Dr. Paul Layer, Associate Professor Geochronology is the study of time in relationship to the history of the Earth. There are many ways to measure the age of geologic events, but a common method for determining the age of rocks and minerals is the potassium-argon dating method. This method uses the radioactive decay of potassium-40 as a sort of geologic "clock". The UAF Geochronology Laboratory uses ...

Welcome to the Geology Wing Exploring this series of exhibits will take you on a journey through the history of the Earth, with stops at particular points in time to examine the fossil record and stratigraphy. The Geology Wing is organized according to the geologic time scale. If you wish to begin browsing now, click on any division of the time scale below. You might wish to start in the Cenozoic Era (65 million years ago to the present) and work back through time, or start with Hadea ...

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Discover the worldwide development of firearms from the 17th century to World War II in the Nunnemacher Arms Collection. Now showing. Uncover Imperial secrets when Dragon Skies: Astronomy of Imperial China opens July 8. Free with Museum admission. Dive into the Triwizard Tournament and join the Yule Ball with Harry Potter and the Goblet of Fire: The IMAX Experience. Now showing. Explore your world and experience the 6-story IMAX Dome with The Living Sea, Mystery of the Nile, Lewis & Cl ...

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Geology The Pleistocene was known for its ice ages. An ice age is a time when many glaciers cover many parts of the earth. Scientists have come up with many reasons for an ice age: The earth right now is on an approximate tilt of 23.1 degrees. Most scientists now support the theory that during earth' s many past ice ages, the earth was not on a tilt. If this happened, sunlight would not reach the poles, allowing much snow to accumulate. Once enough snow accumulated, the pressure of the glaci ...

I N T R O D U C T I O N A simple introduction. containing the background, thesis, and methodology of the MRBLOCH SALT ARCHIVES. Introduction P H Y S I O L O G Y Water and salt are essential for maintaining extra cellular and intracellular concentrations of salt to activate cells in all plant and animal life. The body may endure periods of lack of food, but without salt and water , living cells would quickly perish from dehydration. Prior to the Industrial revolution, Water w ...

Economic Resources / Stratigraphic Sciences / Paleontology Our interest group is engaged in a range of interesting research programs in petroleum geology, reservoir geology and geophysics, economic geology and mineral deposits, sedimentology and diagenesis, facies analysis and sequence stratigraphy, sedimentary paleoenvironments, basin analysis, paleoecology, and vertebrate and invertebrate paleontology. The programs are directed by faculty in the Geological Sciences, with strong ties to facult ...

Cenozoic Era: Stratigraphy The Cenozoic is divided into two main sub-divisions: the Tertiary and the Quaternary. Most of the Cenozoic is the Tertiary, from 65 million years ago to 1.8 million years ago. The Quaternary includes only the last 1.8 million years. The concepts of Tertiary and Quaternary have an interesting history. In the 1760's and 1770's a geologist named Giovanni Arduino was studying the rocks and minerals in Tuscany. He classified mountains according to the type of rocks ...

We have a text-only version of this page. Introduction to Geology | Navigating our Geology Wing (mya = million years ago) Phanerozoic Eon (543 mya to present) Cenozoic Era (65 mya to today)Quaternary (1.8 mya to today) Holocene (10,000 years to today) Pleistocene (1.8 mya to 10,000 yrs) Tertiary (65 to 1.8 mya) Pliocene (5.3 to 1.8 mya) Miocene (23.8 to 5.3 mya) Oligocene (33.7 to 23.8 mya) Eocene (54.8 to 33.7 mya) Paleoc ...

USGS Home Contact USGS Search USGS National Geomagnetism Program Home Program Summary Operations Observatories Data Raw Real-time Definitive Program Services Models Charts Movies Papers Abstracts Software Customers Partners Intermagnet Intro to Geomag FAQ's Further Reading Links Website Credits Contact Us Real-time monitoring of the Earth's magnetic field Data for research and practical application The satellite perspective map seen here dep ...

What is Beringia? New at the Centre NEW Ice Age Gallery Imagine a world where the vast steppe stretches unbroken as far as the eye can see. Envision a place where predators of staggering proportions compete with human hunters for food. Picture a land where the animals and plants struggle to survive in the cold, dry treeless expanse. Explore the treasures of that world within the Yukon Beringia Interpretive Centre and watch Beringia come alive. Copyright ©2000 Government of Yukon, Dept. of Tourism and Culture, Museums Unit. All rights reserved. No part of this website may be reproduced except for non-commercial and academic purposes.New Online Exhibits: Ice Age Gallery 2.6 Million Years of Climate Change

Last modified on: June 1/2006 email the webmaster Yukon Geological Survey staff carry out regional bedrock mapping projects, mineral deposit studies, placer deposit studies, mineral assessments, and geochemical, geophysical and environmental studies. The Survey is assisted by other government agencies, including the Geological Survey of Canada, Canadian universities and industry partners. 2006 Field Projects Yukon Placer Database 2006 Paleozoic Evolution and Metallogeny of Pericratonic Terranes, GAC Special Volume Reprinting of Ecoregions - full-colour hard-cover book YGS Newsletter, January 2006 All graphical images and maps are copyright of the Yukon Geological Survey.