Dunes in Arizona

heavy crop (heav'-y). A collective term used in Great Britain for the heavy minerals of a sedimentary rock.

Evening views of Washington, D.C. and the Capitol building. Left: ©Shutterstock.com/Visions of America; right: ©Shutterstock.com/Richard Cavalleri

Learn what the Trump Administration and Congress did in 2017

Critical Issues Webinars

Register for our free webinar, Tracking the Global Supply of Critical Materials, which will be held on Friday January 26th, 2018 at 11:00am EST.

Flow of data

is updated weekly! 122,576 references to recent publications were loaded.

Arizona Sandstone, AGI Lands End shirts. (Left: ©Michael Collier, right three AGI)

Now you can sport our signature "I'm a Geoscientist" logo
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Congressional Geoscience Fellowship

Spend a year on Capitol Hill combining your science and policy making. Apply by 1 February.


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