. . . "⁴⁰Ar/³⁹Ar geochronology of hypabyssal igneous rocks in the Marañon basin of Peru--a record of thermal history, structure, and alteration"@en . . . . . . . . . . . . . . "⁴°Ar/³⁹Ar geochronology of hypabyssal igneous rocks in the Marañon basin of Peru--a record of thermal history, structure, and alteration" . . . .