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pubs.usgs.gov

the publications warehouse contains over 170,000 publications that cover the 150 year history of the usgs

sciencedirect.com

sciencedirect is the world's leading source for scientific, technical, and medical research. explore journals, books and articles.

ui.adsabs.harvard.edu

a powerful, streamlined new astrophysics data system

usgs.gov

Yes and no. It depends on which glaciers you are considering. Parts of the Antarctic Continent have had continuous glacier cover for perhaps as long as 20 million years. Other areas, such as valley glaciers of the Antarctic Peninsula and glaciers of the Transantarctic Mountains may date from the early Pleistocene. For Greenland, ice cores and related data suggest that all of southern Greenland and most of northern Greenland were ice-free during the last interglacial period, approximately 125,000 years ago. Then, climate was as much as 3-5o Fahrenheit warmer than the interglacial period we currently live in. Although the higher mountains of Alaska have hosted glaciers for as much as the past 4 million years, temperate glaciers in Alaska are generally much, much younger. Many formed as recently as the start of the Little Ice Age, approximately 700 years ago. Others may ...

onlinelibrary.wiley.com

one of the largest and most authoritative collections of online journals, books, and research resources, covering life, health, social, and physical sciences.

link.springer.com

providing access to millions of research articles and chapters from science, technology and medicine, and humanities and social sciences

researchgate.net

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mindat.org

Mindat.org is the world's leading website about minerals and where they come from.