State shifts in the deep Critical Zone drive landscape evolution in volcanic terrains
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Abstract
Understanding the near-surface environment where atmospheric and solid earth processes interact, often termed the “Critical Zone,” is important for assessing resources and building resilient societies. Here, we examine a volcanic landscape in the Oregon Cascade Range, an understudied Critical Zone setting that is host to major regional water resources, pervasive silicate weathering, and significant geohazards. We leverage a bedrock age chronosequence to show that the volcanic Critical Zone undergoes a structural shift, from depth extents of >1 km to meters, over timescales of ~1 My. We map an active groundwater volume comparable to major continental lakes, stored at the Cascade Range crest. This state shift makes volcanic landscape evolution a unique probe of deep coupling between Earth systems.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | State shifts in the deep Critical Zone drive landscape evolution in volcanic terrains |
| Series title | PNAS |
| DOI | 10.1073/pnas.2415155122 |
| Volume | 122 |
| Issue | 2 |
| Publication Date | January 13, 2025 |
| Year Published | 2025 |
| Language | English |
| Publisher | National Academy of Sciences |
| Contributing office(s) | Geology, Geophysics, and Geochemistry Science Center |
| Description | e2415155122, 9 p. |
| Google Analytic Metrics | Metrics page |