title: Gravitational Evidence for a Low-Density Mass beneath the Galapagos Islands.
abstract: A residual negative free-air and Bouguer anomaly of at least 80 milligals, superimposed on a broader high, occurs over the Galápagos Islands The axis of the anomaly trends roughly east and plunges eastward. Thus, a low-density mass in the crust or upper mantle must underlie the archipelago. This anomaly may be caused by thermal expansion over a crust-mantle " hot spot".
authors.forename: J E
authors.initials: JE
authors.lastname: Case
authors.forename: S L
authors.initials: SL
authors.lastname: Ryland
authors.forename: T
authors.initials: T
authors.lastname: Simkin
authors.forename: K A
authors.initials: KA
authors.lastname: Howard