Map (IMAGE) Virginia Tech Caption Holbrook and collaborators at eight other universities in the U.S. and Canada will conduct field work and modeling at seven sites that span the continental U.S. from Maryland to Southern California. The team hopes to better understand the connections between the deep critical zone and ecosystem resilience, watershed hydrology, and erosion. The project includes an ambitious program of drilling deep holes, geochemical sampling, geophysical surveying, hydrology, and numerical modeling. Credit Virginia Tech Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.