An MIT study of the freshwater greenfin darter fish suggests river erosion can be a driver of biodiversity in tectonically inactive regions. Credits: Image: Jose-Luis Olivares/MIT with fish photo by Isaac Szabo

River erosion can shape fish evolution

Broad surfaces called terraces preserve ancient river floodplains and landscape history up to hundreds of meters above the Fortymile River, a tributary of the Yukon River, in eastern Alaska. Researchers from the USGS, the University of Vermont, Purdue University and Utah State University publish definitive support that increases in sediment deposited to oceans from river erosion coincide with dramatic changes in glacial cycles. Credit: USGS

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