title: Cracks and pores: a closer look.
abstract: Most pores and some cracks in several rocks, as directly viewed with a new technique, have a shape that suggests an origin early in the history of these rocks. Thus, behavior in the laboratory may be a reliable indication of behavior in the earth's crust, for electrical resistivity, permeability, or other properties that depend on microporosity.
authors.forename: W F
authors.initials: WF
authors.lastname: Brace
authors.forename: E
authors.initials: E
authors.lastname: Silver
authors.forename: K
authors.initials: K
authors.lastname: Hadley
authors.forename: C
authors.initials: C
authors.lastname: Goetze