title: Yellowstone: seismic evidence for a chemical mantle plume.
abstract: Arrivals of P waves from a recent event at the Nevada Test Site, recorded at a distance of 15.3 degrees , passed beneath the Yellowstone caldera at depths of 200 and 400 kilometers. The travel time anomalies are modeled by a vertical cylindrical structure with a high-velocity core and a low-velocity collar as compared with the more normal mantle. The velocity structure and vertical extent of this feature are consistent with a chemical mantle plume beneath the Yellowstone caldera.
authors.forename: D M
authors.initials: DM
authors.lastname: Hadley
authors.forename: G S
authors.initials: GS
authors.lastname: Stewart
authors.forename: J E
authors.initials: JE
authors.lastname: Ebel