Unified Interior Regions


States L2 Landing Page Tabs

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Image: Sampling in the Grand Canyon High Flow Experiment

Sampling in the Grand Canyon High Flow Experiment

USGS Aquatic Ecologist Ted Kennedy sampling invertebrate and organic drift at Lees Ferry during the November 19, 2012 HFE.

April 8, 2020

Aggregates Data by State, Type, and End Use; 1971–2016

This data set contains supplemental aggregates data for the USGS Minerals Yearbook Volume II—Area Reports: Domestic. It contains data for the years 1971 through 2016 and replaces the discrete construction aggregate tables that were included in the individual State chapters prior to 2014. It contains

October 1, 2018

2009 Report (All Tables)

2009 Report (All Tables)

October 22, 2018

Microscopic Imager Calibration Report

Microscopic Imager Calibration Report.

Image: Grand Canyon

Grand Canyon

Grand Canyon.